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

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.