{ "document": { "category": "csaf_base", "csaf_version": "2.0", "distribution": { "tlp": { "label": "WHITE" } }, "lang": "en", "notes": [ { "category": "legal_disclaimer", "text": "The Netherlands Cyber Security Center (henceforth: NCSC-NL) maintains this portal to enhance access to its information and vulnerabilities. The use of this information is subject to the following terms and conditions:\n\nThe vulnerabilities disclosed in this portal are gathered by NCSC-NL from a variety of open sources, which the user can retrieve from other platforms. NCSC-NL makes every reasonable effort to ensure that the content of this portal is kept up to date, and that it is accurate and complete. Nevertheless, NCSC-NL cannot entirely rule out the possibility of errors, and therefore cannot give any warranty in respect of its completeness, accuracy or real-time keeping up-to-date. NCSC-NL does not control nor guarantee the accuracy, relevance, timeliness or completeness of information obtained from these external sources. The vulnerabilities disclosed in this portal are intended solely for the convenience of professional parties to take appropriate measures to manage the risks posed to the cybersecurity. No rights can be derived from the information provided therein.\n\nNCSC-NL and the Kingdom of the Netherlands assume no legal liability or responsibility for any damage resulting from either the use or inability of use of the vulnerabilities disclosed in this portal. This includes damage resulting from the inaccuracy of incompleteness of the information contained in it.\nThe information on this page is subject to Dutch law. All disputes related to or arising from the use of this portal regarding the disclosure of vulnerabilities will be submitted to the competent court in The Hague. This choice of means also applies to the court in summary proceedings." } ], "publisher": { "category": "coordinator", "contact_details": "cert@ncsc.nl", "name": "National Cyber Security Centre", "namespace": "https://www.ncsc.nl/" }, "title": "CVE-2026-35616", "tracking": { "current_release_date": "2026-05-13T01:04:02.067188Z", "generator": { "date": "2026-02-17T15:00:00Z", "engine": { "name": "V.E.L.M.A", "version": "1.7" } }, "id": "CVE-2026-35616", "initial_release_date": "2026-04-04T13:27:29.512124Z", "revision_history": [ { "date": "2026-04-04T13:27:29.512124Z", "number": "1", "summary": "CVE created.| Source created.| CVE status created. (valid)| Description created for source." }, { "date": "2026-04-04T13:27:36.248634Z", "number": "2", "summary": "NCSC Score created." }, { "date": "2026-04-04T13:30:48.416422Z", "number": "3", "summary": "Description removed for source.| Products removed (3).| References created (1)." }, { "date": "2026-04-04T16:33:56.218749Z", "number": "4", "summary": "Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| References created (1).| CWES updated (1)." }, { "date": "2026-04-04T16:34:01.783290Z", "number": "5", "summary": "NCSC Score updated." }, { "date": "2026-04-04T16:38:52.430021Z", "number": "6", "summary": "Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| Products created (1).| Product Identifiers created (2).| References created (1).| CWES updated (1).| Unknown change." }, { "date": "2026-04-04T16:38:55.028309Z", "number": "7", "summary": "NCSC Score updated." }, { "date": "2026-04-04T16:40:23.889376Z", "number": "8", "summary": "Source connected.| CVE status created. (valid)" }, { "date": "2026-04-04T17:54:01.280612Z", "number": "9", "summary": "Source connected.| CVE status created. (valid)| EPSS created." }, { "date": "2026-04-04T17:54:03.187597Z", "number": "10", "summary": "NCSC Score updated." }, { "date": "2026-04-04T18:12:39.938437Z", "number": "11", "summary": "Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| Products created (2)." }, { "date": "2026-04-04T18:12:45.801112Z", "number": "12", "summary": "Source created.| CVE status created. (valid)| Products connected (1)." }, { "date": "2026-04-04T18:12:48.118250Z", "number": "13", "summary": "NCSC Score updated." }, { "date": "2026-04-05T06:29:27.784323Z", "number": "14", "summary": "Source created.| CVE status created. (valid)| News created (1)." }, { "date": "2026-04-05T06:29:29.424489Z", "number": "15", "summary": "NCSC Score updated." }, { "date": "2026-04-05T19:35:28.571749Z", "number": "16", "summary": "Source connected.| CVE status created. (valid)| News created (1)." }, { "date": "2026-04-05T19:35:32.948667Z", "number": "17", "summary": "NCSC Score updated." }, { "date": "2026-04-06T10:30:51.824857Z", "number": "18", "summary": "Source connected.| CVE status created. (valid)| News created (1)." }, { "date": "2026-04-06T10:30:53.695707Z", "number": "19", "summary": "NCSC Score updated." }, { "date": "2026-04-06T15:38:52.757086Z", "number": "20", "summary": "References created (1).| Unknown change." }, { "date": "2026-04-06T16:26:33.724836Z", "number": "21", "summary": "References created (1)." }, { "date": "2026-04-06T16:43:23.048393Z", "number": "22", "summary": "Source connected.| CVE status created. (valid)| Description created for source.| Products connected (1).| Exploits created (1).| References created (1).| CWES updated (1)." }, { "date": "2026-04-06T16:43:24.476626Z", "number": "23", "summary": "Source connected.| CVE status created. (valid)| News created (1)." }, { "date": "2026-04-06T16:43:29.513273Z", "number": "24", "summary": "NCSC Score updated." }, { "date": "2026-04-06T17:21:04.511188Z", "number": "25", "summary": "NCSC Score updated." }, { "date": "2026-04-06T18:24:58.551287Z", "number": "26", "summary": "Products created (2).| Product Identifiers created (2)." }, { "date": "2026-04-06T18:25:04.060559Z", "number": "27", "summary": "NCSC Score updated." }, { "date": "2026-04-07T11:19:32.812516Z", "number": "28", "summary": "NCSC Score updated." }, { "date": "2026-04-07T12:15:39.994627Z", "number": "29", "summary": "Source created.| CVE status created. (valid)| Products created (1).| References created (5)." }, { "date": "2026-04-07T12:15:42.738023Z", "number": "30", "summary": "NCSC Score updated." }, { "date": "2026-04-07T13:17:35.825283Z", "number": "31", "summary": "NCSC Score updated." }, { "date": "2026-04-07T15:04:09.598200Z", "number": "32", "summary": "EPSS updated." }, { "date": "2026-04-07T15:04:21.724601Z", "number": "33", "summary": "NCSC Score updated." }, { "date": "2026-04-08T02:45:22.202805Z", "number": "34", "summary": "Source created.| CVE status created. (valid)" }, { "date": "2026-04-08T22:49:40.596720Z", "number": "35", "summary": "NCSC Score updated." }, { "date": "2026-04-09T12:01:47.472159Z", "number": "36", "summary": "Source created.| CVE status created. (valid)| Description created for source.| Products created (1).| Exploits created (1).| References created (2).| CWES updated (1)." }, { "date": "2026-04-09T12:01:49.794355Z", "number": "37", "summary": "Source created.| CVE status created. (valid)| Description created for source.| Products connected (1).| Exploits created (1).| References created (2).| CWES updated (1)." }, { "date": "2026-04-09T12:01:49.924116Z", "number": "38", "summary": "NCSC Score updated." }, { "date": "2026-04-10T17:00:52.545512Z", "number": "39", "summary": "EPSS updated." }, { "date": "2026-04-10T17:00:55.681806Z", "number": "40", "summary": "NCSC Score updated." }, { "date": "2026-04-14T18:05:04.706573Z", "number": "41", "summary": "Source connected.| CVE status created. (valid)| News created (1)." }, { "date": "2026-04-14T18:05:08.992079Z", "number": "42", "summary": "NCSC Score updated." }, { "date": "2026-04-15T00:27:34.966718Z", "number": "43", "summary": "NCSC Score updated." }, { "date": "2026-04-17T10:04:34.605496Z", "number": "44", "summary": "Source connected.| CVE status created. (valid)| News created (1)." }, { "date": "2026-04-17T10:04:41.784645Z", "number": "45", "summary": "NCSC Score updated." }, { "date": "2026-04-20T10:18:46.396591Z", "number": "46", "summary": "NCSC Score updated." }, { "date": "2026-04-20T12:21:33.701456Z", "number": "47", "summary": "NCSC Score updated." }, { "date": "2026-04-21T15:56:59.207291Z", "number": "48", "summary": "EPSS updated." }, { "date": "2026-04-21T15:57:05.368158Z", "number": "49", "summary": "NCSC Score updated." }, { "date": "2026-04-22T14:26:38.610060Z", "number": "50", "summary": "EPSS updated." }, { "date": "2026-04-22T14:26:44.121975Z", "number": "51", "summary": "NCSC Score updated." }, { "date": "2026-04-25T14:24:39.437650Z", "number": "52", "summary": "EPSS updated." }, { "date": "2026-04-25T14:24:41.055705Z", "number": "53", "summary": "NCSC Score updated." }, { "date": "2026-05-05T22:24:41.732446Z", "number": "54", "summary": "NCSC Score updated." }, { "date": "2026-05-06T16:44:49.561592Z", "number": "55", "summary": "EPSS updated." }, { "date": "2026-05-06T16:44:57.298925Z", "number": "56", "summary": "NCSC Score updated." }, { "date": "2026-05-08T20:22:49.166409Z", "number": "57", "summary": "NCSC Score updated." }, { "date": "2026-05-12T21:17:44.532225Z", "number": "58", "summary": "NCSC Score updated." }, { "date": "2026-05-13T01:03:57.546711Z", "number": "59", "summary": "Source connected.| CVE status created. (valid)| News created (1)." } ], "status": "interim", "version": "59" } }, "product_tree": { "branches": [ { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:unknown/ems <7.4.7", "product": { "name": "vers:unknown/ems <7.4.7", "product_id": "CSAFPID-6005428" } } ], "category": "product_name", "name": "FortiClient" }, { "branches": [ { "category": "product_version_range", "name": "vers:fortinet/7.2", "product": { "name": "vers:fortinet/7.2", "product_id": "CSAFPID-5573835" } }, { "category": "product_version_range", "name": "vers:fortinet/7.4.5", "product": { "name": "vers:fortinet/7.4.5", "product_id": "CSAFPID-5995465" } }, { "category": "product_version_range", "name": "vers:fortinet/7.4.6", "product": { "name": "vers:fortinet/7.4.6", "product_id": "CSAFPID-5995464" } }, { "category": "product_version_range", "name": "vers:semver/7.4.5|<=7.4.6", "product": { "name": "vers:semver/7.4.5|<=7.4.6", "product_id": "CSAFPID-5995094", "product_identification_helper": { "cpe": "cpe:2.3:a:fortinet:forticlientems:7.4.5:*:*:*:*:*:*:*" } } } ], "category": "product_name", "name": "FortiClientEMS" }, { "branches": [ { "category": "product_version_range", "name": "vers:unknown/unknown", "product": { "name": "vers:unknown/unknown", "product_id": "CSAFPID-1332184" } } ], "category": "product_name", "name": "Forticlient" }, { "branches": [ { "category": "product_version_range", "name": "vers:unknown/unknown", "product": { "name": "vers:unknown/unknown", "product_id": "CSAFPID-6016131" } } ], "category": "product_name", "name": "forticlient_ems" }, { "branches": [ { "category": "product_version_range", "name": "vers:unknown/7.4.5", "product": { "name": "vers:unknown/7.4.5", "product_id": "CSAFPID-6001552", "product_identification_helper": { "cpe": "cpe:2.3:a:fortinet:forticlientems:7.4.5:*:*:*:*:*:*:*" } } }, { "category": "product_version_range", "name": "vers:unknown/7.4.6", "product": { "name": "vers:unknown/7.4.6", "product_id": "CSAFPID-6001553", "product_identification_helper": { "cpe": "cpe:2.3:a:fortinet:forticlientems:7.4.6:*:*:*:*:*:*:*" } } } ], "category": "product_name", "name": "forticlientems" } ], "category": "vendor", "name": "Fortinet" } ] }, "vulnerabilities": [ { "cve": "CVE-2026-35616", "notes": [ { "category": "description", "text": "A improper access control vulnerability in Fortinet FortiClientEMS 7.4.5 through 7.4.6 may allow an unauthenticated attacker to execute unauthorized code or commands via crafted requests.", "title": "nvd - https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2026-35616" }, { "category": "description", "text": "A improper access control vulnerability in Fortinet FortiClientEMS 7.4.5 through 7.4.6 may allow an unauthenticated attacker to execute unauthorized code or commands via crafted requests.", "title": "cveprojectv5 - https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/35xxx/CVE-2026-35616.json" }, { "category": "description", "text": "An Improper Access Control vulnerability [CWE-284] in FortiClient EMS may allow an unauthenticated attacker to execute unauthorized code or commands via crafted requests.Fortinet has observed this to be exploited in the wild and urges vulnerable customers to install the hotfix for FortiClient EMS 7.4.5 and 7.4.6, by following the instructions at:https://docs.fortinet.com/document/forticlient/7.4.5/ems-release-notes/832484 - for FortiClientEMS 7.4.5https://docs.fortinet.com/document/forticlient/7.4.6/ems-release-notes/832484 - for FortiClientEMS 7.4.6Upcoming FortiClientEMS 7.4.7 will also include a fix for this issue. In the meantime the hotfix above is sufficient to prevent it entirely.", "title": "fortinet - https://fortiguard.fortinet.com/psirt/cvrf/FG-IR-26-099" }, { "category": "description", "text": "Fortinet FortiClient EMS contains an improper access control vulnerability that may allow an unauthenticated attacker to execute unauthorized code or commands via crafted requests.\nApply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.", "title": "cisagov - https://www.cisa.gov/sites/default/files/feeds/known_exploited_vulnerabilities.json" }, { "category": "description", "text": "Detects whether Fortinet hotfix FG-IR-26-099 for CVE-2026-35616 is missing by comparing behavioral responses from a certificate-authenticated endpoint. The template sends X-SSL-CLIENT-VERIFY: SUCCESS without certificate material and checks whether this spoofed header changes server behavior.\n", "title": "nucleitemplates - https://github.com/projectdiscovery/nuclei-templates/raw/28f8ccb7ea0eb739058b7bfa2e2bfd97c8f8e7a3/http%2Fcves%2F2026%2FCVE-2026-35616.yaml" }, { "category": "description", "text": "Detects whether Fortinet hotfix FG-IR-26-099 for CVE-2026-35616 is missing by comparing behavioral responses from a certificate-authenticated endpoint. The template sends X-SSL-CLIENT-VERIFY: SUCCESS without certificate material and checks whether this spoofed header changes server behavior.\n", "title": "nucleitemplates - https://github.com/projectdiscovery/nuclei-templates/raw/9b0793eb2362eb003aed65d3dabb20eaae0a7282/http%2Fcves%2F2026%2FCVE-2026-35616.yaml" }, { "category": "other", "text": "0.43209", "title": "EPSS" }, { "category": "other", "text": "7.6", "title": "NCSC Score" }, { "category": "other", "text": "There is cvss data available from a private source, There is news data available from source Bleepingcomputer, Is related to (a version of) an uncommon product, There is product data available from a private source, There is product data available from source Certbundde, Is related to an uncommon product source", "title": "NCSC Score top increasing factors" } ], "product_status": { "known_affected": [ "CSAFPID-5995094", "CSAFPID-5995464", "CSAFPID-5995465", "CSAFPID-1332184", "CSAFPID-6001552", "CSAFPID-6001553", "CSAFPID-6005428", "CSAFPID-6016131" ], "known_not_affected": [ "CSAFPID-5573835" ] }, "references": [ { "category": "external", "summary": "Source - ncscclear", "url": "https://vulnerabilities.ncsc.nl/manual/CVE-2026-35616" }, { "category": "external", "summary": "Source - nvd", "url": "https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2026-35616" }, { "category": "external", "summary": "Source - cveprojectv5", "url": "https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/35xxx/CVE-2026-35616.json" }, { "category": "external", "summary": "Source - ncscclear", "url": "https://advisories.ncsc.nl/advisory?id=NCSC-2026-0107" }, { "category": "external", "summary": "Source - first", "url": "https://api.first.org/data/v1/epss?limit=10000&offset=0" }, { "category": "external", "summary": "Source - fortinet", "url": "https://fortiguard.fortinet.com/psirt/cvrf/FG-IR-26-099" }, { "category": "external", "summary": "Source - fortinet", "url": "https://fortiguard.fortinet.com/psirt/FG-IR-26-099" }, { "category": "external", "summary": "Source - securitynl", "url": "https://www.security.nl/posting/931185/Fortinet+waarschuwt+voor+actief+misbruik+van+kritiek+lek+in+FortiClient+EMS?channel=rss" }, { "category": "external", "summary": "Source - bleepingcomputer", "url": "https://www.bleepingcomputer.com/news/security/new-fortinet-forticlient-ems-flaw-cve-2026-35616-exploited-in-attacks/" }, { "category": "external", "summary": "Source - securityweek", "url": "https://www.securityweek.com/fortinet-rushes-emergency-fixes-for-exploited-zero-day/" }, { "category": "external", "summary": "Source - cisagov", "url": "https://www.cisa.gov/sites/default/files/feeds/known_exploited_vulnerabilities.json" }, { "category": "external", "summary": "Source - bleepingcomputer", "url": "https://www.bleepingcomputer.com/news/security/cisa-orders-feds-to-patch-fortinet-flaw-exploited-in-attacks-by-friday/" }, { "category": "external", "summary": "Source - certbundde", "url": "https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-0962.json" }, { "category": "external", "summary": "Source - hkcert", "url": "https://www.hkcert.org/security-bulletin/fortinet-forticlientems-remote-code-execution-vulnerability_20260408" }, { "category": "external", "summary": "Source - nucleitemplates", "url": "https://github.com/projectdiscovery/nuclei-templates/raw/28f8ccb7ea0eb739058b7bfa2e2bfd97c8f8e7a3/http%2Fcves%2F2026%2FCVE-2026-35616.yaml" }, { "category": "external", "summary": "Source - nucleitemplates", "url": "https://github.com/projectdiscovery/nuclei-templates/raw/9b0793eb2362eb003aed65d3dabb20eaae0a7282/http%2Fcves%2F2026%2FCVE-2026-35616.yaml" }, { "category": "external", "summary": "Source - bleepingcomputer", "url": "https://www.bleepingcomputer.com/news/microsoft/microsoft-april-2026-patch-tuesday-fixes-167-flaws-2-zero-days/" }, { "category": "external", "summary": "Source - bleepingcomputer", "url": "https://www.bleepingcomputer.com/news/security/cisa-flags-apache-activemq-flaw-as-actively-exploited-in-attacks/" }, { "category": "external", "summary": "Source - bleepingcomputer", "url": "https://www.bleepingcomputer.com/news/security/fortinet-warns-of-critical-rce-flaws-in-fortisandbox-and-fortiauthenticator/" }, { "category": "external", "summary": "News - securitynl", "url": "https://www.security.nl/posting/931185/Fortinet+waarschuwt+voor+actief+misbruik+van+kritiek+lek+in+FortiClient+EMS?channel=rss" }, { "category": "external", "summary": "News - bleepingcomputer", "url": "https://www.bleepingcomputer.com/news/security/new-fortinet-forticlient-ems-flaw-cve-2026-35616-exploited-in-attacks/" }, { "category": "external", "summary": "News - securityweek", "url": "https://www.securityweek.com/fortinet-rushes-emergency-fixes-for-exploited-zero-day/" }, { "category": "external", "summary": "News - bleepingcomputer", "url": "https://www.bleepingcomputer.com/news/security/cisa-orders-feds-to-patch-fortinet-flaw-exploited-in-attacks-by-friday/" }, { "category": "external", "summary": "News - bleepingcomputer", "url": "https://www.bleepingcomputer.com/news/microsoft/microsoft-april-2026-patch-tuesday-fixes-167-flaws-2-zero-days/" }, { "category": "external", "summary": "News - bleepingcomputer", "url": "https://www.bleepingcomputer.com/news/security/cisa-flags-apache-activemq-flaw-as-actively-exploited-in-attacks/" }, { "category": "external", "summary": "News - bleepingcomputer", "url": "https://www.bleepingcomputer.com/news/security/fortinet-warns-of-critical-rce-flaws-in-fortisandbox-and-fortiauthenticator/" }, { "category": "external", "summary": "Reference - cveprojectv5; ncscclear; nvd", "url": "https://fortiguard.fortinet.com/psirt/FG-IR-26-099" }, { "category": "external", "summary": "Reference - cveprojectv5; nvd", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-35616" }, { "category": "external", "summary": "Reference - cisagov; nucleitemplates", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-35616" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-0962.json" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2026-0962" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://www.fortiguard.com/psirt/FG-IR-26-099" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://github.com/advisories/GHSA-gvcr-mc93-7p8p" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog" }, { "category": "external", "summary": "Reference - nucleitemplates", "url": "https://bishopfox.com/blog/api-authentication-bypass-in-forticlient-ems-7-4-5-7-4-6-cve-2026-35616" } ], "scores": [ { "cvss_v3": { "version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "baseScore": 9.8, "baseSeverity": "CRITICAL" }, "products": [ "CSAFPID-1332184", "CSAFPID-5995094", "CSAFPID-5995464", "CSAFPID-5995465", "CSAFPID-6001552", "CSAFPID-6001553", "CSAFPID-6005428", "CSAFPID-6016131" ] } ], "title": "CVE-2026-35616" } ] }