SEPTEMBER 16, 2026
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Case File

CVE-2026-91948

HIGH · CVSS 7.5 EPSS 0.65% Public Exploit

Source: NVD + CISA KEV + EPSS · Published 2026-09-15 · Last synced 2026-09-16

CyberRota Analysis

AI-Generated

FreeRDP versions prior to 3.31.0 are vulnerable to an out-of-bounds write issue in server-side static virtual channel handling, specifically when the CHANNEL_OPTION_SHOW_PROTOCOL is enabled. This flaw allows authenticated clients to send oversized channel messages, leading to buffer underflow and heap memory corruption, which could facilitate arbitrary code execution. Organizations using affected versions of FreeRDP should prioritize patching to mitigate the risk of exploitation.

Public Exploit Signal

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

Detected Signals
code execution

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

CVE
CVE-2026-91948
Severity
HIGH
CVSS
7.5
EPSS
0.65%

Original NVD Description

FreeRDP versions before 3.31.0 contain an out-of-bounds write vulnerability in server-side static virtual channel handling when CHANNEL_OPTION_SHOW_PROTOCOL is enabled. Authenticated clients can queue oversized channel messages that cause buffer underflow and corrupt heap memory including live pointers, potentially enabling code execution.