{"id":"CVE-2026-109246","published":"2026-10-12T17:17:15.630","lastModified":"2026-10-18T12:17:02.880","description":"FreeRDP before 3.32.0 contains a divide-by-zero vulnerability in the freerdp-shadow-cli shadow server: the frame id in a client's Frame Acknowledge PDU is stored without a range check, so the in-flight frame count in shadow_encoder_inflight_frames() can underflow. An authenticated client can acknowledge a frame id one greater than the last frame sent, causing shadow_encoder_create_frame_id() to divide by zero (SIGFPE) and terminate the process, disconnecting all viewers.","cvssScore":6.5,"cvssSeverity":"MEDIUM","cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","cwes":["CWE-191"],"vendors":[],"products":[],"references":[{"url":"https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-6vjv-4hm3-6698","tags":[]},{"url":"https://www.vulncheck.com/advisories/freerdp-before-3.32.0-shadow-server-divide-by-zero-via-frame-acknowledge-pdu","tags":[]},{"url":"https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-6vjv-4hm3-6698","tags":[]}],"exploitRefs":[{"url":"https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-6vjv-4hm3-6698","tags":[]},{"url":"https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-6vjv-4hm3-6698","tags":[]}],"hasPoc":true,"ai":null}