Out-of-bounds Read in Freerdp
CVE-2026-109253
FreeRDP from 3.9.0 before 3.32.0 contains an out-of-bounds read vulnerability in the RDPEAR NDR scalar readers, which check value length before consuming alignment padding. Malicious or compromised RDP servers can send crafted unaligned RDPEAR payloads, such as CreateApReqAuthenticatorReq messages, to clients using Remote Credential Guard, causing over-reads and potentially crashing the client process.
Vulnerability class: Buffer Overflow
Published .
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/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-6rj3-rf6g-3vw5 (vendor-advisory)
- www.vulncheck.com/advisories/freerdp-3.9.0-before-3.32.0-rdpear-ndr-scalar-out-… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-109253?
- CVE-2026-109253 is a medium-severity vulnerability in Freerdp, classified under Out-of-bounds Read. CVSS score: 5.3/10. Published 2026-10-12.
- How severe is CVE-2026-109253?
- Medium severity. CVSS v3 base score is 5.3 out of 10.