{"id":"CVE-2026-107611","published":"2026-10-08T14:16:49.727","lastModified":"2026-10-08T21:10:00.133","description":"An out-of-bounds read vulnerability in the ZRLE decoder of GlavSoft TightVNC Viewer for Windows before 2.8.88 allows a malicious or compromised VNC server to read heap memory beyond the palette allocation and crash the viewer by sending ZRLE-encoded tiles whose palette indices exceed the declared palette size. readPaletteRleTile() and readPackedPaletteTile() use the attacker-supplied index to look up colours without validating it against the palette size; out-of-bounds heap data is copied into the framebuffer (garbled display) or the read faults, terminating the viewer.","cvssScore":7.1,"cvssSeverity":"HIGH","cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H","cwes":["CWE-125"],"vendors":[],"products":[],"references":[{"url":"https://sourceforge.net/p/vnc-tight/bugs/1657/","tags":[]},{"url":"https://www.tightvnc.com/whatsnew.php","tags":[]}],"exploitRefs":[],"hasPoc":false,"ai":null}