{"affected":[{"defaultStatus":"unaffected","ecosystem":"github","packageName":"vrpn/vrpn","product":"VRPN","source":"CNA: VulnCheck","vendor":"VRPN","versions":[{"lessThanOrEqual":"07.36","status":"affected","version":"0","versionType":"custom"}]}],"cveId":"CVE-2026-123200","cwes":["CWE-129"],"description":"VRPN through 07.36 contains an out-of-bounds stack write vulnerability in vrpn_Endpoint::handle_sender_message() and handle_type_message() that allows unauthenticated remote peers to write outside a stack buffer via an unchecked length index. Attackers can connect, complete the version-cookie exchange, and send a SENDER_DESCRIPTION or TYPE_DESCRIPTION message with an out-of-range or negative index to crash the process.","epss":{"date":"2026-11-09","percentile":0.39068,"score":0.00446},"exploits":[],"kev":null,"metrics":[{"score":8.7,"severity":"high","source":"CNA: VulnCheck","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","version":"4.0"},{"score":7.5,"severity":"high","source":"CNA: VulnCheck","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},{"score":8.7,"severity":"high","source":"NVD: disclosure@vulncheck.com","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","version":"4.0"},{"score":7.5,"severity":"high","source":"NVD: disclosure@vulncheck.com","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"}],"modifiedAt":1794246343758,"publishedAt":1793902597053,"references":[{"source":"CNA: VulnCheck","tags":["patch"],"url":"https://github.com/vrpn/vrpn/commit/0da5b0b71e06e8c318a4e674c84caee12251a782"},{"source":"CNA: VulnCheck","tags":["patch"],"url":"https://github.com/vrpn/vrpn/commit/c893b583d928fd17d756b39271b2eae71766e7f2"},{"source":"CNA: VulnCheck","tags":["technical-description"],"url":"https://github.com/vrpn/vrpn/blob/79deb000cc0b47ae49a80c92c78167c02d8a04d8/vrpn_Connection.C#L4554"},{"source":"CNA: VulnCheck","tags":["technical-description"],"url":"https://github.com/vrpn/vrpn/blob/79deb000cc0b47ae49a80c92c78167c02d8a04d8/vrpn_Connection.C#L4482"},{"source":"CNA: VulnCheck","tags":["third-party-advisory"],"url":"https://www.vulncheck.com/advisories/vrpn-through-07.36-out-of-bounds-write-via-sender-description-type-description-length-index"},{"source":"disclosure@vulncheck.com","tags":[],"url":"https://github.com/vrpn/vrpn/blob/79deb000cc0b47ae49a80c92c78167c02d8a04d8/vrpn_Connection.C#L4482"},{"source":"disclosure@vulncheck.com","tags":[],"url":"https://github.com/vrpn/vrpn/blob/79deb000cc0b47ae49a80c92c78167c02d8a04d8/vrpn_Connection.C#L4554"},{"source":"disclosure@vulncheck.com","tags":[],"url":"https://github.com/vrpn/vrpn/commit/0da5b0b71e06e8c318a4e674c84caee12251a782"},{"source":"disclosure@vulncheck.com","tags":[],"url":"https://github.com/vrpn/vrpn/commit/c893b583d928fd17d756b39271b2eae71766e7f2"},{"source":"disclosure@vulncheck.com","tags":[],"url":"https://www.vulncheck.com/advisories/vrpn-through-07.36-out-of-bounds-write-via-sender-description-type-description-length-index"}],"remediation":[{"kind":"fix","source":"CNA: VulnCheck","text":"The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches.","url":"https://github.com/vrpn/vrpn/commit/0da5b0b71e06e8c318a4e674c84caee12251a782"},{"kind":"fix","source":"CNA: VulnCheck","text":"The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches.","url":"https://github.com/vrpn/vrpn/commit/c893b583d928fd17d756b39271b2eae71766e7f2"}],"revision":"ee7804f78a9cae945f3db50c0bce3cd5d6040fbed64973443bba645bfa13d28d","sources":[{"modifiedAt":1794246343758,"name":"CNA: VulnCheck","retrievedAt":1794247811448,"url":"https://www.cve.org/CVERecord?id=CVE-2026-123200"},{"modifiedAt":1793906238953,"name":"NVD","retrievedAt":1793946366223,"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-123200"},{"modifiedAt":null,"name":"FIRST EPSS","retrievedAt":1794247813056,"url":"https://api.first.org/data/v1/epss?cve=CVE-2026-123200"}],"ssvc":{"assessedAt":1794246132454,"automatable":"yes","exploitation":"none","source":"ADP: CISA-ADP","technicalImpact":"partial"},"status":"published","title":"VRPN through 07.36 Out-of-bounds Write via SENDER_DESCRIPTION/TYPE_DESCRIPTION length index","updatedAt":1794247813056}