Medium severity · published Oct 13, 2026
CVE-2026-109951
FreeRDP 3.17.1 before 3.32.0 Heap Buffer Over-Read via Proxy DRDYNVC Channel Name
5.3
CVSS
0.4%
EPSS
No
On KEV
Description
FreeRDP 3.17.1 before 3.32.0 contains a heap buffer over-read vulnerability in DynvcTrackerHandleCreateBack of the freerdp-proxy DRDYNVC channel handler that allows malicious backend RDP servers to read heap memory out of bounds. Attackers can send a CREATE_REQUEST_PDU whose channel name lacks a NUL byte, causing an unbounded snprintf read that leaks memory into proxy logs or crashes the process.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
Low
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 30% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
FR
FreeRDP · FreeRDP
3.17.1 before 3.32.0 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-109951
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-109951
vendor-advisory
https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-g4wg-67xq-8q53
third-party-advisory
https://www.vulncheck.com/advisories/freerdp-3.17.1-before-3.32.0-heap-buffer-over-read-via-proxy-drdynvc-channel-name
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