Medium severity · published Oct 13, 2026
CVE-2026-109940
FreeRDP 3.0.0-beta1 before 3.32.0 Stack Buffer Overflow via PKCS#11 Key Name
4.6
CVSS
0.1%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Physical
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.1% · higher than 3% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
FR
FreeRDP · FreeRDP
3.0.0-beta1 before 3.32.0 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-109940
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-109940
vendor-advisory
https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-g8jw-gv54-r94p
third-party-advisory
https://www.vulncheck.com/advisories/freerdp-3.0.0-beta1-before-3.32.0-stack-buffer-overflow-via-pkcs-11-key-name
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