CVE-2026-91954CWE-476

CVE-2026-91954

Medium · published September 15, 2026

CVSS v3.1
6.5
EPSS
0%
Percentile
30.8
In the wild
Unconfirmed
What it is

FreeRDP before 3.31.0 contains a null pointer dereference vulnerability in gdi_surface_bits when processing Surface Bits commands with NSCodec codec ID. A malicious RDP server can crash a FreeRDP client by sending a crafted Surface Bits command claiming to use NSCodec, even when the codec is disabled.

The record
Technical detail
CVSS v3.1
6.5 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
CVSS v4.0
7.1 · CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
EPSS
0.00380 · 30.8th percentile
Weakness
CWE-476 · NULL Pointer Dereference
Published
2026-09-15T20:17Z
Affected products (1)
ProductVersionsFixed in
freerdp/freerdp< 3.31.03.31.0
References (2)
https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-ffjr-p229-hpch · [email protected]https://www.vulncheck.com/advisories/freerdp-before-3.31.0-null-pointer-dereference-via-nscodec · [email protected]
EPSS history
Timeline
  • 17 SEP 03:33Z
    EPSS moved — → 0%
    epss
  • 15 SEP 15:18Z
    FreeRDP before 3.31.0 NULL Pointer Dereference via NSCodec
    cvelistv5