SEPTEMBER 17, 2026
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Case File

CVE-2026-91961

MEDIUM · CVSS 6.5 EPSS 0.35% Public Exploit

Source: NVD + CISA KEV + EPSS · Published 2026-09-15 · Last synced 2026-09-17

CyberRota Analysis

AI-Generated

FreeRDP versions prior to 3.31.0 are vulnerable to a denial-of-service attack due to improper validation of the OutputBufferSize in the URBDRC control-transfer request path. An attacker operating a malicious RDP server can exploit this flaw by sending a control-transfer request with an oversized OutputBufferSize, leading to a client process crash. Organizations utilizing FreeRDP should prioritize patching to mitigate the risk of service disruption.

Public Exploit Signal

A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.

GitHub PoC Links

Note: these links are listed for security research and verification purposes only.

CVE
CVE-2026-91961
Severity
MEDIUM
CVSS
6.5
EPSS
0.35%

Original NVD Description

FreeRDP before 3.31.0 contains a denial-of-service vulnerability in the URBDRC control-transfer request path that fails to validate OutputBufferSize before forwarding to the libusb backend. A malicious RDP server can send a control-transfer request with OutputBufferSize set to 65536, triggering a reachable assertion that terminates the client process.