{"id":"EM-20261104-JZVU","url":"https://cyber.eventmonitor.net/incident/EM-20261104-JZVU/critical-freerdp-vulnerability-cve-2026-121952/","type":"cve","title":"Critical FreeRDP Vulnerability (CVE-2026-121952)","subtitle":"CVE-2026-121952","subject":"CVE-2026-121952","status":"Developing","severity":"critical","affected":[],"headline":null,"born":"2026-11-04T16:17:47.530Z","firstSignal":"2026-11-04T15:33:18.000Z","lastSignal":"2026-11-04T16:17:47.530Z","updated":"2026-11-07T00:59:45.971Z","revision":1,"life":[{"status":"Born","at":"2026-11-04T16:17:47.530Z","why":"second independent source: C6 NVD CVE API 2.0"},{"status":"Developing","at":"2026-11-04T16:17:47.530Z","why":"signals keep joining"}],"changeLog":[{"at":"2026-11-04T15:33:18.000Z","what":"First signal: C41 Red Hat Security Data"},{"at":"2026-11-04T16:17:47.530Z","what":"Born: second source, C6 NVD CVE API 2.0. Page EM-20261104-JZVU created."},{"at":"2026-11-04T16:17:47.530Z","what":"Severity raised to Critical by C6"}],"stages":[{"name":"Disclosed","at":"2026-11-04T16:17:47.530Z","detail":"C6 NVD published"},{"name":"Scored","at":"2026-11-04T16:17:47.530Z","detail":"CVSS 9.3 · EPSS 0.5%"},{"name":"Exploited","at":null,"detail":"No exploitation reported"},{"name":"Advisories","at":null,"detail":"None yet"},{"name":"Vendor Response","at":"2026-11-04T15:33:18.000Z","detail":"C41 published"},{"name":"Resolved","at":null,"detail":"After 14 quiet days"}],"signals":[{"at":"2026-11-04T15:33:18.000Z","source":"C41","sourceName":"Red Hat Security Data","role":"Vendor","severity":3,"title":"Red Hat: CVE-2026-121952 (important)","text":"freerdp: freerdp: Out-of-bounds write in proxy bitmap cache v2 capability handling","url":"https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2026-121952.json"},{"at":"2026-11-04T16:17:47.530Z","source":"C6","sourceName":"NVD CVE API 2.0","role":"Database","severity":4,"title":"CVE-2026-121952 (CVSS 9.3)","text":"FreeRDP before 3.32.2 has an out-of-bounds write in the proxy because rdp_read_bitmap_cache_v2_capability_set rejects only numCellCaches values above 5, yet the bitmap cache v2 cell array is later accessed at fixed indices 0 through 4. A client connecting to the proxy can declare fewer than five cell caches in its Confirm Active, causing heap corruption, heap data leakage to the backend, or a crash.","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-121952"}],"crowd":[],"reference":{"nvd":{"published":"2026-11-04T16:17:47.530","score":9.3,"severity":"CRITICAL","desc":"FreeRDP before 3.32.2 has an out-of-bounds write in the proxy because rdp_read_bitmap_cache_v2_capability_set rejects only numCellCaches values above 5, yet the bitmap cache v2 cell array is later accessed at fixed indices 0 through 4. A client connecting to the proxy can declare fewer than five…","product":"Freerdp","seen":1793917591435},"kev":null,"epss":{"epss":0.00503,"pct":0.43223,"at":1794013185971},"p0":false},"mergedInto":null,"publisher":"Event Monitor Cyber"}