CVE-2026-91955 FreeRDP - Denial of Service

FreeRDP < 3.31.0 contains a denial of service caused by improper validation of client-supplied DesktopWidth and DesktopHeight during GCC negotiation, letting remote attackers crash the server by sending crafted RDP packets.

CVSS base score 7.5 /10
High
CISA KEV
Not listed
Public exploit
Proof of concept available
Authentication
Not required
EPSS
0.57% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Denial of Service
Impact
Denial Of Service
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Published
15 September 2026
Updated
15 October 2026
Weakness
CWE-369

Vendor fix

Upgrade to version 3.31.0 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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