{"id":"EM-20261104-49A6","url":"https://cyber.eventmonitor.net/incident/EM-20261104-49A6/netrek-client-cow-vulnerability-cve-2026-121969/","type":"cve","title":"netrek-client-cow Vulnerability (CVE-2026-121969)","subtitle":"CVE-2026-121969","subject":"CVE-2026-121969","status":"Developing","severity":"high","affected":[],"headline":null,"born":"2026-11-04T21:18:06.840Z","firstSignal":"2026-11-04T20:36:47.000Z","lastSignal":"2026-11-04T21:18:06.840Z","updated":"2026-11-06T12:16:45.734Z","revision":1,"life":[{"status":"Born","at":"2026-11-04T21:18:06.840Z","why":"second independent source: C6 NVD CVE API 2.0"},{"status":"Developing","at":"2026-11-04T21:18:06.840Z","why":"signals keep joining"}],"changeLog":[{"at":"2026-11-04T20:36:47.000Z","what":"First signal: C41 Red Hat Security Data"},{"at":"2026-11-04T21:18:06.840Z","what":"Born: second source, C6 NVD CVE API 2.0. Page EM-20261104-49A6 created."},{"at":"2026-11-04T21:18:06.840Z","what":"Severity raised to High by C6"}],"stages":[{"name":"Disclosed","at":"2026-11-04T21:18:06.840Z","detail":"C6 NVD published"},{"name":"Scored","at":"2026-11-04T21:18:06.840Z","detail":"CVSS 7.1 · EPSS 0.3%"},{"name":"Exploited","at":null,"detail":"No exploitation reported"},{"name":"Advisories","at":null,"detail":"None yet"},{"name":"Vendor Response","at":"2026-11-04T20:36:47.000Z","detail":"C41 published"},{"name":"Resolved","at":null,"detail":"After 14 quiet days"}],"signals":[{"at":"2026-11-04T20:36:47.000Z","source":"C41","sourceName":"Red Hat Security Data","role":"Vendor","severity":2,"title":"Red Hat: CVE-2026-121969 (moderate)","text":"netrek-client-cow: netrek-client-cow: Denial of Service via stack-based buffer overflow in handleSMessage","url":"https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2026-121969.json"},{"at":"2026-11-04T21:18:06.840Z","source":"C6","sourceName":"NVD CVE API 2.0","role":"Database","severity":3,"title":"CVE-2026-121969 (CVSS 7.1)","text":"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.","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-121969"}],"crowd":[],"reference":{"nvd":{"published":"2026-11-04T21:18:06.840","score":7.1,"severity":"HIGH","desc":"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…","product":"","seen":1793917591435},"kev":null,"epss":{"epss":0.00344,"pct":0.28096,"at":1793967405734},"p0":false},"mergedInto":null,"publisher":"Event Monitor Cyber"}