{"affected":[{"defaultStatus":"unaffected","product":"netrek-client-cow","source":"CNA: VulnCheck","vendor":"quozl","versions":[{"lessThanOrEqual":"3.3.3","status":"affected","version":"0","versionType":"custom"}]}],"cveId":"CVE-2026-121969","cwes":["CWE-121"],"description":"netrek-client-cow through 3.3.3 contains a stack-based buffer overflow vulnerability in handleSMessage() in short.c that allows malicious servers to overflow a 100-byte stack buffer by sending oversized SP_S_MESSAGE packets. A malicious Netrek server or man-in-the-middle on the plaintext TCP connection can send overlong or unterminated message bodies to write server-controlled bytes onto the stack and crash the client.","epss":null,"exploits":[],"kev":null,"metrics":[{"score":7.1,"severity":"high","source":"CNA: VulnCheck","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","version":"4.0"},{"score":6.5,"severity":"medium","source":"CNA: VulnCheck","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","version":"3.1"}],"modifiedAt":1793824607609,"publishedAt":1793824607609,"references":[{"source":"CNA: VulnCheck","tags":["patch"],"url":"https://github.com/quozl/netrek-client-cow/commit/fb322e74abee3b0b76a9c5a31df6aab5585d3127"},{"source":"CNA: VulnCheck","tags":["product"],"url":"https://github.com/quozl/netrek-client-cow"},{"source":"CNA: VulnCheck","tags":["technical-description"],"url":"https://github.com/quozl/netrek-client-cow/blob/3.3.3/short.c#L949"},{"source":"CNA: VulnCheck","tags":["issue-tracking"],"url":"https://github.com/quozl/netrek-client-cow/issues/11"},{"source":"CNA: VulnCheck","tags":["third-party-advisory"],"url":"https://www.vulncheck.com/advisories/netrek-client-cow-through-3.3.3-stack-buffer-overflow-via-handlesmessage"}],"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/quozl/netrek-client-cow/commit/fb322e74abee3b0b76a9c5a31df6aab5585d3127"}],"revision":"0bcbd958abde4f8a382a9b6d18f041514cb3973decbe9893746eb9f11c646579","sources":[{"modifiedAt":1793824607609,"name":"CNA: VulnCheck","retrievedAt":1793826711269,"url":"https://www.cve.org/CVERecord?id=CVE-2026-121969"}],"ssvc":null,"status":"published","title":"netrek-client-cow through 3.3.3 Stack Buffer Overflow via handleSMessage","updatedAt":1793826711269}