Buffer overflow in Freerdp
CVE-2026-109255
FreeRDP 3.0.0 before 3.32.0 contains an integer truncation vulnerability in license_check_stream_length that allows a malicious RDP server to trigger a heap buffer overflow on 32-bit clients. Attackers can send a crafted SERVER_LICENSE_REQUEST with a large scopeCount that bypasses length checks, causing out-of-bounds writes leading to denial of service or remote code execution.
Vulnerability class: Buffer Overflow
Published .
CVSS v3 metric
CVSS v3 base score 6.8 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:H.
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-hxw3-57rq-3v4m (vendor-advisory)
- www.vulncheck.com/advisories/freerdp-3.0.0-before-3.32.0-heap-buffer-overflow-v… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-109255?
- CVE-2026-109255 is a medium-severity vulnerability in Freerdp, classified under Heap-based Buffer Overflow. CVSS score: 6.8/10. Published 2026-10-12.
- How severe is CVE-2026-109255?
- Medium severity. CVSS v3 base score is 6.8 out of 10.