Out-of-bounds Read in Freerdp
CVE-2026-109950
FreeRDP from 3.0.0 before 3.32.0 contains a heap out-of-bounds read vulnerability that allows a malicious RD Gateway to crash clients by sending mismatched message lengths. Attackers controlling the gateway can set MsgBytes far larger than the NDR string ActualCount in consent or service messages, causing UTF-8 conversion to read past the stream allocation and disrupt client availability.
Vulnerability class: Buffer Overflow
Published .
CVSS v3 metric
CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/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-xf45-j844-588v (vendor-advisory)
- www.vulncheck.com/advisories/freerdp-3.0.0-before-3.32.0-heap-out-of-bounds-rea… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-109950?
- CVE-2026-109950 is a medium-severity vulnerability in Freerdp, classified under Out-of-bounds Read. CVSS score: 4.3/10. Published 2026-10-13.
- How severe is CVE-2026-109950?
- Medium severity. CVSS v3 base score is 4.3 out of 10.