Buffer Over-Read Vulnerability in FreeRDP by FreeRDP
CVE-2026-91959

7.1HIGH

Key Information:

Vendor

Freerdp

Status
Freerdp
Vendor
CVE Published:
15 September 2026

What is CVE-2026-91959?

FreeRDP versions prior to 3.31.0 are susceptible to a buffer over-read vulnerability within the rts_read_result function in the RPC gateway transport parser. This flaw permits attackers to exploit the system by sending a specially crafted BIND_ACK PDU containing a truncated result entry, leading to potential out-of-bounds read and process abortion. Safeguarding against this vulnerability is crucial to maintain the security and integrity of the affected systems.

Affected Version(s)

FreeRDP 0 < 3.31.0

FreeRDP 3.31.0

References

https://github.com/FreeRDP/FreeRDP/security/advisories/GH...
vendor-advisory
https://www.vulncheck.com/advisories/freerdp-before-3.31....
third-party-advisory

CVSS V4

Score:
7.1
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
Unknown

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Nambers
.