{ "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-2026-16812", "tracking": { "current_release_date": "2026-08-11T10:01:20.220245Z", "generator": { "date": "2026-02-17T15:00:00Z", "engine": { "name": "V.E.L.M.A", "version": "1.7" } }, "id": "CVE-2026-16812", "initial_release_date": "2026-07-27T16:33:53.510870Z", "revision_history": [ { "date": "2026-07-27T16:33:53.510870Z", "number": "1", "summary": "CVE created.| Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| References created (1).| CWES updated (1)." }, { "date": "2026-07-27T16:34:01.148833Z", "number": "2", "summary": "NCSC Score created." }, { "date": "2026-07-27T16:38:58.014846Z", "number": "3", "summary": "Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| Products created (4).| References created (1).| CWES updated (1)." }, { "date": "2026-07-27T16:38:59.603082Z", "number": "4", "summary": "NCSC Score updated." }, { "date": "2026-07-27T17:39:30.469845Z", "number": "5", "summary": "Unknown change." }, { "date": "2026-07-27T18:03:46.131532Z", "number": "6", "summary": "Source created.| CVE status created. (valid)| Description created for source.| CWES updated (1)." }, { "date": "2026-07-27T18:03:47.761272Z", "number": "7", "summary": "NCSC Score updated." }, { "date": "2026-07-27T20:07:57.311327Z", "number": "8", "summary": "Source connected.| CVE status created. (valid)| Description created for source.| Products created (1).| Exploits created (1).| References created (2).| CWES updated (1)." }, { "date": "2026-07-27T20:08:05.348965Z", "number": "9", "summary": "NCSC Score updated." }, { "date": "2026-07-27T20:27:46.805164Z", "number": "10", "summary": "References created (1)." }, { "date": "2026-07-27T20:39:38.168053Z", "number": "11", "summary": "References created (1).| Unknown change." }, { "date": "2026-07-27T23:05:21.145964Z", "number": "12", "summary": "Source created.| CVE status created. (valid)| News created (1)." }, { "date": "2026-07-27T23:05:29.287642Z", "number": "13", "summary": "NCSC Score updated." }, { "date": "2026-07-28T00:47:39.357636Z", "number": "14", "summary": "Source connected.| CVE status created. (valid)| Description created for source.| CVSS created.| Products created (1).| Exploits created (1).| References created (1).| Exploitable created." }, { "date": "2026-07-28T00:47:42.888006Z", "number": "15", "summary": "NCSC Score updated." }, { "date": "2026-07-28T07:30:53.515226Z", "number": "16", "summary": "Source created.| CVE status created. (valid)| News created (1)." }, { "date": "2026-07-28T07:30:59.402469Z", "number": "17", "summary": "NCSC Score updated." }, { "date": "2026-07-28T08:31:22.382527Z", "number": "18", "summary": "Source created.| CVE status created. (valid)| News created (1)." }, { "date": "2026-07-28T08:31:31.465986Z", "number": "19", "summary": "NCSC Score updated." }, { "date": "2026-07-28T15:18:21.586097Z", "number": "20", "summary": "NCSC Score updated." }, { "date": "2026-07-28T15:26:08.009457Z", "number": "21", "summary": "Products created (4).| Product Identifiers created (4)." }, { "date": "2026-07-28T15:26:10.414437Z", "number": "22", "summary": "NCSC Score updated." }, { "date": "2026-07-28T15:40:42.133069Z", "number": "23", "summary": "Source connected.| CVE status created. (valid)| EPSS created." }, { "date": "2026-07-28T15:40:44.220543Z", "number": "24", "summary": "NCSC Score updated." }, { "date": "2026-07-28T17:15:50.777639Z", "number": "25", "summary": "NCSC Score updated." }, { "date": "2026-08-07T11:05:39.145982Z", "number": "26", "summary": "Source created.| CVE status created. (valid)| Products created (4).| References created (3)." }, { "date": "2026-08-07T11:05:47.657948Z", "number": "27", "summary": "NCSC Score updated." }, { "date": "2026-08-10T18:03:28.821642Z", "number": "28", "summary": "Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| References created (1)." }, { "date": "2026-08-10T18:03:41.846631Z", "number": "29", "summary": "NCSC Score updated." }, { "date": "2026-08-11T09:14:24.890470Z", "number": "30", "summary": "Source connected.| CVE status created. (valid)" } ], "status": "interim", "version": "30" } }, "product_tree": { "branches": [ { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:unknown/<5.2.3.14", "product": { "name": "vers:unknown/<5.2.3.14", "product_id": "CSAFPID-8947266" } }, { "category": "product_version_range", "name": "vers:unknown/<6.1.3.4", "product": { "name": "vers:unknown/<6.1.3.4", "product_id": "CSAFPID-8947267" } }, { "category": "product_version_range", "name": "vers:unknown/<6.4.2.4", "product": { "name": "vers:unknown/<6.4.2.4", "product_id": "CSAFPID-8947268" } }, { "category": "product_version_range", "name": "vers:unknown/<7.0.0.1", "product": { "name": "vers:unknown/<7.0.0.1", "product_id": "CSAFPID-8947269" } }, { "category": "product_version_range", "name": "vers:unknown/unknown", "product": { "name": "vers:unknown/unknown", "product_id": "CSAFPID-8901004" } } ], "category": "product_name", "name": "VeloCloud Orchestrator" } ], "category": "vendor", "name": "Arista" }, { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:unknown/5.2.0|<5.2.3.14", "product": { "name": "vers:unknown/5.2.0|<5.2.3.14", "product_id": "CSAFPID-8900534" } }, { "category": "product_version_range", "name": "vers:unknown/6.1.0|<6.1.3.4", "product": { "name": "vers:unknown/6.1.0|<6.1.3.4", "product_id": "CSAFPID-8900535" } }, { "category": "product_version_range", "name": "vers:unknown/6.4.0|<6.4.2.4", "product": { "name": "vers:unknown/6.4.0|<6.4.2.4", "product_id": "CSAFPID-8900536" } }, { "category": "product_version_range", "name": "vers:unknown/7.0.0|<7.0.0.1", "product": { "name": "vers:unknown/7.0.0|<7.0.0.1", "product_id": "CSAFPID-8900537" } }, { "category": "product_version_range", "name": "vers:unknown/unknown", "product": { "name": "vers:unknown/unknown", "product_id": "CSAFPID-8901554" } } ], "category": "product_name", "name": "VeloCloud Orchestrator On-Prem" } ], "category": "vendor", "name": "Arista Networks" }, { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:unknown/7.0.0", "product": { "name": "vers:unknown/7.0.0", "product_id": "CSAFPID-8903130", "product_identification_helper": { "cpe": "cpe:2.3:a:arista:velocloud_orchestrator:7.0.0:*:*:*:*:*:*:*" } } }, { "category": "product_version_range", "name": "vers:unknown/>=5.2.0|<5.2.3.14", "product": { "name": "vers:unknown/>=5.2.0|<5.2.3.14", "product_id": "CSAFPID-8903127", "product_identification_helper": { "cpe": "cpe:2.3:a:arista:velocloud_orchestrator:*:*:*:*:*:*:*:*" } } }, { "category": "product_version_range", "name": "vers:unknown/>=6.1.0|<6.1.3.4", "product": { "name": "vers:unknown/>=6.1.0|<6.1.3.4", "product_id": "CSAFPID-8903128", "product_identification_helper": { "cpe": "cpe:2.3:a:arista:velocloud_orchestrator:*:*:*:*:*:*:*:*" } } }, { "category": "product_version_range", "name": "vers:unknown/>=6.4.0|<6.4.2.4", "product": { "name": "vers:unknown/>=6.4.0|<6.4.2.4", "product_id": "CSAFPID-8903129", "product_identification_helper": { "cpe": "cpe:2.3:a:arista:velocloud_orchestrator:*:*:*:*:*:*:*:*" } } } ], "category": "product_name", "name": "velocloud_orchestrator" } ], "category": "vendor", "name": "arista" } ] }, "vulnerabilities": [ { "cve": "CVE-2026-16812", "cwe": { "id": "CWE-78", "name": "Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')" }, "notes": [ { "category": "description", "text": "VeloCloud Orchestrator (VCO) on-prem has a security issue where this issue may allow a remote attacker to access privileged internal functionality and impact the VCO host. Successful exploitation may compromise the confidentiality, integrity, and availability of the orchestrator and data managed by the orchestrator.\n\n\n\n\nThis functionality was intended to be for internal use only and is not intended to be remotely accessible.\n\n\n\n\nHosted and Dedicated versions of VCO have already been patched in advance of this notice going out.\n\n\n\n\nThis issue was discovered externally and is known to be actively exploited.", "title": "nvd - https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2026-16812" }, { "category": "description", "text": "VeloCloud Orchestrator (VCO) on-prem has a security issue where this issue may allow a remote attacker to access privileged internal functionality and impact the VCO host. Successful exploitation may compromise the confidentiality, integrity, and availability of the orchestrator and data managed by the orchestrator.\n\n\n\n\nThis functionality was intended to be for internal use only and is not intended to be remotely accessible.\n\n\n\n\nHosted and Dedicated versions of VCO have already been patched in advance of this notice going out.\n\n\n\n\nThis issue was discovered externally and is known to be actively exploited.", "title": "cveprojectv5 - https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/16xxx/CVE-2026-16812.json" }, { "category": "description", "text": "There is no single definitive indicator of compromise for this issue.\n\nOperators should review VCO web access logs for unexpected activity. Requests containing unusual URL-like path components, encoded characters, references to local or internal services, or high request rates should be investigated.\n\nOperators should also review VCO backend application logs and system logs for activity near the same timestamps. The following may warrant review:\n\n* Incoming requests to the VCO from known malicious IPs\n* Unexpected outbound HTTP or HTTPS activity originating from the VCO host\n* Sensitive configuration changes that do not correspond to administrator activity\n* Privileged maintenance actions that are not associated with expected administrative workflows\n* Unexpected command execution, file creation, database export, or archive artifacts on the VCO host\n* Unexpected access to VCO database contents, configuration data, device inventory, credentials, certificates, or key material\n\nThe following IP addresses have been observed conducting the attacks. It is advised to block these IPs and review logs to see if they are present:\n\n* 8.19.75.217\n* 206.72.242.124\n* 206.72.242.162\n\n**If compromise is suspected, operators should preserve VCO web access logs, backend application logs, system logs, database logs, and relevant file-system timestamps before remediation where operationally feasible.**", "title": "arista - https://www.arista.com/en/support/advisories-notices/security-advisory/24364-security-advisory-0144" }, { "category": "description", "text": "Arista VeloCloud Orchestrator On-Prem contains an OS command injection vulnerability that may allow a remote attacker to access privileged internal functionality and impact the VCO host. Successful exploitation may compromise the confidentiality, integrity, and availability of the orchestrator and data managed by the orchestrator.\nApply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.", "title": "cisagov - https://www.cisa.gov/sites/default/files/feeds/known_exploited_vulnerabilities.json" }, { "category": "description", "text": "VeloCloud Orchestrator (VCO) on-prem has a security issue where this issue may allow a remote attacker to access privileged internal functionality and impact the VCO host. Successful exploitation may compromise the confidentiality, integrity, and availability of the orchestrator and data managed by the orchestrator.\n\n\n\n\nThis functionality was intended to be for internal use only and is not intended to be remotely accessible.\n\n\n\n\nHosted and Dedicated versions of VCO have already been patched in advance of this notice going out.\n\n\n\n\nThis issue was discovered externally and is known to be actively exploited.", "title": "euvdkev - https://euvdservices.enisa.europa.eu/api/search?fromScore=0&toScore=10&fromEpss=0&toEpss=100&exploited=true&page=0&size=50" }, { "category": "description", "text": "Two issues: (a) unauthN'ed endpoint for CA rotation, (b) endpoint allows for bash command injection, leading to RCE.\n\nThis issue came up in a customer report (INC-2113721) which was traced to a zero-day by Arista IR and Velo SREs.", "title": "arista - https://www.arista.com/assets/data/SecurityAdvisories/CSAF/arista_networks_security_advisory_144_CSAF.json" }, { "category": "other", "text": "0.0098", "title": "EPSS" }, { "category": "other", "text": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/S:P", "title": "CVSSV4" }, { "category": "other", "text": "10.0", "title": "CVSSV4 base score" }, { "category": "other", "text": "6.1", "title": "NCSC Score" }, { "category": "other", "text": "Is related to an uncommon cwe source, There is cvss data available from a private source, There is product data available from a private source, There is product data available from source Certbundde, There is news data available from source Bleepingcomputer", "title": "NCSC Score top increasing factors" }, { "category": "other", "text": "Is related to CWE-78 (Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')), Is related to an uncommon product vendor", "title": "NCSC Score top decreasing factors" } ], "product_status": { "known_affected": [ "CSAFPID-8900534", "CSAFPID-8900535", "CSAFPID-8900536", "CSAFPID-8900537", "CSAFPID-8901004", "CSAFPID-8901554", "CSAFPID-8903127", "CSAFPID-8903128", "CSAFPID-8903129", "CSAFPID-8903130", "CSAFPID-8947266", "CSAFPID-8947267", "CSAFPID-8947268", "CSAFPID-8947269" ] }, "references": [ { "category": "external", "summary": "Source - euvdkev", "url": "https://euvdservices.enisa.europa.eu/api/search?fromScore=0&toScore=10&fromEpss=0&toEpss=100&exploited=true&page=0&size=50" }, { "category": "external", "summary": "Source - cisagov", "url": "https://www.cisa.gov/sites/default/files/feeds/known_exploited_vulnerabilities.json" }, { "category": "external", "summary": "Source - arista", "url": "https://www.arista.com/en/support/advisories-notices/security-advisory/24364-security-advisory-0144" }, { "category": "external", "summary": "Source - cveprojectv5", "url": "https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/16xxx/CVE-2026-16812.json" }, { "category": "external", "summary": "Source - nvd", "url": "https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2026-16812" }, { "category": "external", "summary": "Source - bleepingcomputer", "url": "https://www.bleepingcomputer.com/news/security/arista-patches-velocloud-orchestrator-zero-day-exploited-in-attacks/" }, { "category": "external", "summary": "Source - securityweek", "url": "https://www.securityweek.com/critical-arista-velocloud-orchestrator-vulnerability-exploited-as-zero-day/" }, { "category": "external", "summary": "Source - securitynl", "url": "https://www.security.nl/posting/946943/Arista+waarschuwt+voor+actief+misbruik+van+kritiek+lek+in+VeloCloud+Orchestrator?channel=rss" }, { "category": "external", "summary": "Source - first", "url": "https://api.first.org/data/v1/epss?limit=10000&offset=30000" }, { "category": "external", "summary": "Source - certbundde", "url": "https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-2702.json" }, { "category": "external", "summary": "Source - arista", "url": "https://www.arista.com/assets/data/SecurityAdvisories/CSAF/arista_networks_security_advisory_144_CSAF.json" }, { "category": "external", "summary": "Source - ncscclear", "url": "https://advisories.ncsc.nl/advisory?id=NCSC-2026-0281" }, { "category": "external", "summary": "News - securityweek", "url": "https://www.securityweek.com/critical-arista-velocloud-orchestrator-vulnerability-exploited-as-zero-day/" }, { "category": "external", "summary": "News - securitynl", "url": "https://www.security.nl/posting/946943/Arista+waarschuwt+voor+actief+misbruik+van+kritiek+lek+in+VeloCloud+Orchestrator?channel=rss" }, { "category": "external", "summary": "News - bleepingcomputer", "url": "https://www.bleepingcomputer.com/news/security/arista-patches-velocloud-orchestrator-zero-day-exploited-in-attacks/" }, { "category": "external", "summary": "Reference - certbundde; cisagov; cveprojectv5; euvdkev; nvd", "url": "https://www.arista.com/en/support/advisories-notices/security-advisory/24364-security-advisory-0144" }, { "category": "external", "summary": "Reference - cveprojectv5; nvd", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-16812" }, { "category": "external", "summary": "Reference - cisagov", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-16812" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-2702.json" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2026-2702" }, { "category": "external", "summary": "Reference - arista", "url": "https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-16812" } ], "scores": [ { "cvss_v3": { "version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H", "baseScore": 10.0, "baseSeverity": "CRITICAL" }, "products": [ "CSAFPID-8900534", "CSAFPID-8900535", "CSAFPID-8900536", "CSAFPID-8900537", "CSAFPID-8901004", "CSAFPID-8901554", "CSAFPID-8903127", "CSAFPID-8903128", "CSAFPID-8903129", "CSAFPID-8903130", "CSAFPID-8947266", "CSAFPID-8947267", "CSAFPID-8947268", "CSAFPID-8947269" ] } ], "threats": [ { "category": "exploit_status", "details": "exploited" } ], "title": "CVE-2026-16812" } ] }