CVE-2026-91955

HighCVSS 7.5/10Last modified Sep 24, 2026

Description

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.

Metrics

CVSS 3.1 7.5/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Weakness enumeration

CWE-369

Affected software

No affected versions have been published.

Timeline

Published
Sep 15, 2026
Last modified
Sep 24, 2026
NVD status
Analyzed

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CVE-2026-91955: High severity, CVSS 7.5 | Vulnix