Out-of-bounds Read in Freerdp
CVE-2026-91959
FreeRDP before 3.31.0 contains a buffer over-read vulnerability in the rts_read_result function within the RPC gateway transport parser. Attackers can send a malicious BIND_ACK PDU with a truncated result entry to trigger an out-of-bounds read causing process abort.
Vulnerability class: Buffer Overflow
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H.
Affected products
Weakness classification (CWE)
References
- disclosure@vulncheck.com (vendor-advisory)
- disclosure@vulncheck.com (third-party-advisory)
Frequently asked questions
- What is CVE-2026-91959?
- CVE-2026-91959 is a medium-severity vulnerability in Freerdp, classified under Out-of-bounds Read. CVSS score: 6.5/10. Published 2026-09-15.
- How severe is CVE-2026-91959?
- Medium severity. CVSS v3 base score is 6.5 out of 10.