{ "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-2026-34352", "tracking": { "current_release_date": "2026-04-02T20:32:10.177705Z", "generator": { "date": "2026-02-17T15:00:00Z", "engine": { "name": "V.E.L.M.A", "version": "1.7" } }, "id": "CVE-2026-34352", "initial_release_date": "2026-03-26T23:25:04.955824Z", "revision_history": [ { "date": "2026-03-26T23:25:04.955824Z", "number": "1", "summary": "CVE created.| Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| References created (4).| CWES updated (1)." }, { "date": "2026-03-26T23:25:07.864837Z", "number": "2", "summary": "NCSC Score created." }, { "date": "2026-03-26T23:38:47.500503Z", "number": "3", "summary": "Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| Products created (1).| References created (4).| CWES updated (1)." }, { "date": "2026-03-26T23:38:53.089858Z", "number": "4", "summary": "NCSC Score updated." }, { "date": "2026-03-27T11:11:07.190092Z", "number": "5", "summary": "Source created.| CVE status created. (valid)| Products created (1).| References created (4)." }, { "date": "2026-03-27T11:11:10.446488Z", "number": "6", "summary": "NCSC Score updated." }, { "date": "2026-03-27T19:41:52.670408Z", "number": "7", "summary": "Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| Products connected (8).| Product Identifiers created (4).| Product Remediations created (8).| References created (6).| CWES updated (1).| Vendor_assessment created." }, { "date": "2026-03-27T19:41:57.168159Z", "number": "8", "summary": "NCSC Score updated." }, { "date": "2026-03-27T19:44:27.865603Z", "number": "9", "summary": "Unknown change." }, { "date": "2026-03-27T20:55:57.582533Z", "number": "10", "summary": "Source connected.| CVE status created. (valid)| EPSS created." }, { "date": "2026-03-28T12:44:48.033917Z", "number": "11", "summary": "Source created.| CVE status created. (valid)| Description created for source.| Products created (2)." }, { "date": "2026-03-28T12:44:53.781769Z", "number": "12", "summary": "NCSC Score updated." }, { "date": "2026-04-02T20:25:53.198207Z", "number": "13", "summary": "Products created (1).| Product Identifiers created (1)." }, { "date": "2026-04-02T20:25:55.302320Z", "number": "14", "summary": "NCSC Score updated." } ], "status": "interim", "version": "14" } }, "product_tree": { "branches": [ { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:rpm/6", "product": { "name": "vers:rpm/6", "product_id": "CSAFPID-1439321", "product_identification_helper": { "cpe": "cpe:/o:redhat:enterprise_linux:6" } } } ], "category": "product_name", "name": "Red Hat Enterprise Linux 6" }, { "branches": [ { "category": "product_version_range", "name": "vers:rpm/7", "product": { "name": "vers:rpm/7", "product_id": "CSAFPID-1439315", "product_identification_helper": { "cpe": "cpe:/o:redhat:enterprise_linux:7" } } } ], "category": "product_name", "name": "Red Hat Enterprise Linux 7" }, { "branches": [ { "category": "product_version_range", "name": "vers:rpm/8", "product": { "name": "vers:rpm/8", "product_id": "CSAFPID-1439317", "product_identification_helper": { "cpe": "cpe:/a:redhat:enterprise_linux:8" } } } ], "category": "product_name", "name": "Red Hat Enterprise Linux 8" }, { "branches": [ { "category": "product_version_range", "name": "vers:rpm/9", "product": { "name": "vers:rpm/9", "product_id": "CSAFPID-1439319", "product_identification_helper": { "cpe": "cpe:/a:redhat:enterprise_linux:9" } } } ], "category": "product_name", "name": "Red Hat Enterprise Linux 9" }, { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:rpm/unknown", "product": { "name": "vers:rpm/unknown", "product_id": "CSAFPID-2265719" } } ], "category": "product_name", "name": "tigervnc" } ], "category": "product_family", "name": "Red Hat Enterprise Linux 6" }, { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:rpm/unknown", "product": { "name": "vers:rpm/unknown", "product_id": "CSAFPID-2265722" } } ], "category": "product_name", "name": "tigervnc" } ], "category": "product_family", "name": "Red Hat Enterprise Linux 7" }, { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:rpm/unknown", "product": { "name": "vers:rpm/unknown", "product_id": "CSAFPID-2265724" } } ], "category": "product_name", "name": "tigervnc" } ], "category": "product_family", "name": "Red Hat Enterprise Linux 8" }, { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:rpm/unknown", "product": { "name": "vers:rpm/unknown", "product_id": "CSAFPID-2265727" } } ], "category": "product_name", "name": "tigervnc" } ], "category": "product_family", "name": "Red Hat Enterprise Linux 9" } ], "category": "vendor", "name": "Red Hat" }, { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:semver/<1.16.2", "product": { "name": "vers:semver/<1.16.2", "product_id": "CSAFPID-5919454" } }, { "category": "product_version_range", "name": "vers:unknown/<1.16.2", "product": { "name": "vers:unknown/<1.16.2", "product_id": "CSAFPID-5985409", "product_identification_helper": { "cpe": "cpe:2.3:a:tigervnc:tigervnc:*:*:*:*:*:*:*:*" } } } ], "category": "product_name", "name": "TigerVNC" } ], "category": "vendor", "name": "TigerVNC" }, { "branches": [ { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:deb/unknown", "product": { "name": "vers:deb/unknown", "product_id": "CSAFPID-5958366" } } ], "category": "product_name", "name": "tigervnc" } ], "category": "product_family", "name": "bookworm" }, { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:deb/unknown", "product": { "name": "vers:deb/unknown", "product_id": "CSAFPID-5958367" } } ], "category": "product_name", "name": "tigervnc" } ], "category": "product_family", "name": "bullseye" } ], "category": "vendor", "name": "Debian" }, { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:unknown/<1.16.2", "product": { "name": "vers:unknown/<1.16.2", "product_id": "CSAFPID-5937950" } } ], "category": "product_name", "name": "tigervnc" } ], "category": "vendor", "name": "Open Source" } ] }, "vulnerabilities": [ { "cve": "CVE-2026-34352", "cwe": { "id": "CWE-732", "name": "Incorrect Permission Assignment for Critical Resource" }, "notes": [ { "category": "description", "text": "In TigerVNC before 1.16.2, Image.cxx in x0vncserver allows other users to observe or manipulate the screen contents, or cause an application crash, because of incorrect permissions.", "title": "nvd - https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2026-34352" }, { "category": "description", "text": "In TigerVNC before 1.16.2, Image.cxx in x0vncserver allows other users to observe or manipulate the screen contents, or cause an application crash, because of incorrect permissions.", "title": "cveprojectv5 - https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/34xxx/CVE-2026-34352.json" }, { "category": "description", "text": "A flaw was found in TigerVNC's x0vncserver component. Due to incorrect permissions in the Image.cxx file, other users on the system can observe or manipulate the screen contents of a running session. This vulnerability could also lead to an application crash, resulting in a Denial of Service (DoS).", "title": "redhat - https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2026-34352.json" }, { "category": "description", "text": "In TigerVNC before 1.16.2, Image.cxx in x0vncserver allows other users to observe or manipulate the screen contents, or cause an application crash, because of incorrect permissions.", "title": "debian - https://security-tracker.debian.org/tracker/CVE-2026-34352" }, { "category": "other", "text": "0.0001", "title": "EPSS" }, { "category": "other", "text": "4.7", "title": "NCSC Score" }, { "category": "other", "text": "There is product data available from source Certbundde", "title": "NCSC Score top increasing factors" }, { "category": "other", "text": "There is product data available from source Debian, Is related to (a version of) an uncommon product", "title": "NCSC Score top decreasing factors" }, { "category": "details", "text": "Severity: 2\n", "title": "Vendor assessment" } ], "product_status": { "known_affected": [ "CSAFPID-5919454", "CSAFPID-5937950", "CSAFPID-1439315", "CSAFPID-1439317", "CSAFPID-1439319", "CSAFPID-1439321", "CSAFPID-2265719", "CSAFPID-2265722", "CSAFPID-2265724", "CSAFPID-2265727", "CSAFPID-5958366", "CSAFPID-5958367", "CSAFPID-5985409" ] }, "references": [ { "category": "external", "summary": "Source - nvd", "url": "https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2026-34352" }, { "category": "external", "summary": "Source - cveprojectv5", "url": "https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/34xxx/CVE-2026-34352.json" }, { "category": "external", "summary": "Source - certbundde", "url": "https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-0888.json" }, { "category": "external", "summary": "Source - redhat", "url": "https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2026-34352.json" }, { "category": "external", "summary": "Source - first", "url": "https://api.first.org/data/v1/epss?limit=10000&offset=0" }, { "category": "external", "summary": "Source - debian", "url": "https://security-tracker.debian.org/tracker/CVE-2026-34352" }, { "category": "external", "summary": "Reference - cveprojectv5; nvd; redhat", "url": "https://github.com/TigerVNC/tigervnc/commit/0b5cab169d847789efa54459a87659d3fd484393" }, { "category": "external", "summary": "Reference - cveprojectv5; nvd; redhat", "url": "https://groups.google.com/g/tigervnc-announce/c/anHL9WLshLI" }, { "category": "external", "summary": "Reference - cveprojectv5; nvd; redhat", "url": "https://sourceforge.net/projects/tigervnc/files/stable/1.16.2" }, { "category": "external", "summary": "Reference - cveprojectv5; nvd; redhat", "url": "https://www.openwall.com/lists/oss-security/2026/03/26/7" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-0888.json" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2026-0888" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://github.com/advisories/GHSA-4VJ5-VH2W-8G5J" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://euvd.enisa.europa.eu/enisa/EUVD-2026-16468" }, { "category": "external", "summary": "Reference - redhat", "url": "https://www.cve.org/CVERecord?id=CVE-2026-34352" }, { "category": "external", "summary": "Reference - redhat", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-34352" } ], "remediations": [ { "category": "mitigation", "details": "The x0vncserver component should be disabled if not actively required. If x0vncserver is necessary, ensure that only trusted users have access to the system where it is running. To disable the x0vncserver service, if it is running as a systemd service, you can use: `sudo systemctl stop x0vncserver.service` `sudo systemctl disable x0vncserver.service` If x0vncserver is launched manually, avoid running it in multi-user environments. A service restart or system reboot may be required for changes to take full effect.", "product_ids": [ "CSAFPID-1439315", "CSAFPID-1439317", "CSAFPID-1439319", "CSAFPID-1439321", "CSAFPID-2265719", "CSAFPID-2265722", "CSAFPID-2265724", "CSAFPID-2265727" ] } ], "scores": [ { "cvss_v3": { "version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:L/A:L", "baseScore": 8.5, "baseSeverity": "HIGH" }, "products": [ "CSAFPID-1439315", "CSAFPID-1439317", "CSAFPID-1439319", "CSAFPID-1439321", "CSAFPID-2265719", "CSAFPID-2265722", "CSAFPID-2265724", "CSAFPID-2265727", "CSAFPID-5919454", "CSAFPID-5937950", "CSAFPID-5958366", "CSAFPID-5958367", "CSAFPID-5985409" ] } ], "title": "CVE-2026-34352" } ] }