CVE-2026-91955 HIGH

CVE-2026-91955: FreeRDP before 3.31.0 Denial of Service via Desktop Dimensions

Vendor Freerdp
Product FreeRDP
Weakness CWE-369
Published September 15, 2026
Last update September 15, 2026
View on NVD All CVEs

CVSS base score

8.2/10
Attack vector Network
Attack complexity High
Privileges required None
User interaction None
Confidentiality —
Integrity —

CVSS vector

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

What the vulnerability does

01Description

FreeRDP before 3.31.0 fails to validate client-supplied DesktopWidth and DesktopHeight values during GCC negotiation, allowing remote attackers to crash the server. Attackers can send crafted RDP packets with zero or oversized dimensions to trigger division-by-zero or assertion failures in multifragment update capability calculations, terminating the server process.

Key dates

02Disclosure timeline

September 15, 2026 CVE published
September 15, 2026 Record updated