Out-of-bounds Read in Freerdp
CVE-2026-109951
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.
Vulnerability class: Buffer Overflow
Published .
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- github.com/FreeRDP/FreeRDP/security/advisories/GHSA-g4wg-67xq-8q53 (vendor-advisory)
- www.vulncheck.com/advisories/freerdp-3.17.1-before-3.32.0-heap-buffer-over-read… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-109951?
- CVE-2026-109951 is a medium-severity vulnerability in Freerdp, classified under Out-of-bounds Read. CVSS score: 5.3/10. Published 2026-10-13.
- How severe is CVE-2026-109951?
- Medium severity. CVSS v3 base score is 5.3 out of 10.