Name: CVE-2026-91959: Out-of-bounds Read
Creator: Rapid7
Published: 2026-09-15T00:00:00.000Z
License: https://www.rapid7.com/legal/website-terms-of-use/
Keywords: CVE, CVE-2026-91959, CWE-125, CVSS 6.5, EPSS 0.0038

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.

CVSS Details

CVSS 4.0 Base Score: 7.1 (HIGH)
CVSS 4.0 Vector: (CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X)
CVSS 3.1 Base Score: 6.5
CVSS 3.1 Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H)

Covered by Rapid7

Product	Vendor Advisory	Solution File	Added	Published
Alma_linux	—	Upgrade freerdpUpgrade libwinpr-develUpgrade freerdp-develUpgrade libwinprUpgrade freerdp-libs	Oct 11, 2026	Oct 6, 2026
Amazon Linux Ami 2	—	Upgrade libwinpr-develUpgrade libwinprUpgrade freerdpUpgrade freerdp-debuginfoUpgrade freerdp-libsUpgrade freerdp-devel	Oct 19, 2026	Oct 19, 2026
Amazon_linux_2023	—	Upgrade freerdp-serverUpgrade libwinpr-debuginfoUpgrade libwinprUpgrade freerdp-libs-debuginfoUpgrade freerdp-libsUpgrade freerdp-develUpgrade libwinpr-develUpgrade freerdp-server-debuginfoUpgrade freerdp-debugsourceUpgrade freerdp-debuginfoUpgrade freerdp	Sep 30, 2026	Sep 15, 2026
Oracle_linux	—	Upgrade freerdp-develUpgrade freerdp-serverUpgrade freerdp-libsUpgrade libwinprUpgrade libwinpr-develUpgrade freerdp	Oct 22, 2026	Sep 15, 2026
Redhat_linux	—	Upgrade freerdp-debugsourceUpgrade freerdp-libs-debuginfoUpgrade freerdp-serverUpgrade libwinpr-debuginfoUpgrade freerdp-debuginfoNo solution existsUpgrade freerdp-libsUpgrade libwinpr-develUpgrade freerdpUpgrade libwinprUpgrade freerdp-develUpgrade freerdp-server-debuginfo	Sep 17, 2026	Sep 15, 2026
Rocky_linux	—	Upgrade freerdp-debugsourceUpgrade freerdpUpgrade freerdp-serverUpgrade libwinpr-debuginfoUpgrade libwinpr-develUpgrade freerdp-develUpgrade freerdp-debuginfoUpgrade libwinprUpgrade freerdp-libsUpgrade freerdp-libs-debuginfoUpgrade freerdp-server-debuginfo	Oct 8, 2026	Oct 7, 2026
Ubuntu	—	Upgrade freerdp3	Sep 22, 2026	Sep 16, 2026

Prioritize with Active Threat Intelligence

With curated Threat Intelligence, you can see which vulnerabilities truly put you at risk, prioritize what matters most, and act before attackers do.

Explore Intelligence Hub

MDR Buyer's Guide

Global Threat Landscape Report

Grow your business

CVSS Details

Covered by Rapid7

Prioritize with Active Threat Intelligence