CVE-2026-23732 MEDIUM

CVE-2026-23732: FreeRDP has heap-buffer-overflow in Glyph_Alloc

Vendor Freerdp
Product FreeRDP
Weakness CWE-122
Published January 19, 2026
Last update January 20, 2026
View on NVD All CVEs

CVSS base score

5.5/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality —
Integrity —

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P

What the vulnerability does

01Description

FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.21.0, FastGlyph parsing trusts `cbData`/remaining length and never validates against the minimum size implied by `cx/cy`. A malicious server can trigger a client‑side global buffer overflow, causing a crash (DoS). Version 3.21.0 contains a patch for the issue.

Key dates

02Disclosure timeline

January 19, 2026 CVE published
January 20, 2026 Record updated