CVE-2026-109940CWE-121

CVE-2026-109940

Medium · published October 13, 2026

CVSS v3.1
4.3
EPSS
0%
Percentile
3.6
In the wild
Unconfirmed
What it is

FreeRDP 3.0.0-beta1 before 3.32.0 on Unix builds with PKCS#11 support has a stack-based buffer overflow in wprintKeyName() in WinPR's NCrypt PKCS#11 provider. It hex-encodes a key's CKA_ID, which can be up to 64 bytes, into a fixed 128-byte stack buffer. An attacker supplying a malicious PKCS#11 token or module whose key and matching certificate use a 55- to 64-byte CKA_ID can overflow the client's stack during key enumeration, causing a crash.

The record
Technical detail
CVSS v3.1
4.3 · MEDIUM
Vector
CVSS:3.1/AV:P/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
CVSS v4.0
5.1 · CVSS:4.0/AV:P/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
EPSS
0.00147 · 3.6th percentile
Weakness
CWE-121 · Stack-based Buffer Overflow
Published
2026-10-13T18:17Z
References (3)
https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-g8jw-gv54-r94p · [email protected]https://www.vulncheck.com/advisories/freerdp-3.0.0-beta1-before-3.32.0-stack-buffer-overflow-via-pkcs-11-key-name · [email protected]https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-g8jw-gv54-r94p · 134c704f-9b21-4f2e-91b3-4a467353bcc0
EPSS history
Timeline
  • 15 OCT 03:28Z
    EPSS moved — → 0%
    epss
  • 13 OCT 13:27Z
    FreeRDP 3.0.0-beta1 before 3.32.0 Stack Buffer Overflow via PKCS#11 Key Name
    cvelistv5
  • 13 OCT 13:27Z
    FreeRDP 3.0.0-beta1 before 3.32.0 Stack Buffer Overflow via PKCS#11 Key Name
    cvelistv5