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CVE-2026-26955 - Vulnerability Analysis

HighCVSS: 8.8

Last Updated: February 25, 2026

FreeRDP - Remote Code Execution

Published: February 25, 2026Updated: February 25, 2026Remote Exploitable

Overview

FreeRDP < 3.23.0 contains a heap buffer overflow caused by missing bounds validation in the GDI surface pipeline ClearCodec command, letting malicious RDP servers execute arbitrary code remotely, exploit requires connection to a malicious server.

Severity & Score

Severity: High

CVSS Score: 8.8

Impact

Malicious RDP servers can execute arbitrary code on FreeRDP clients, potentially leading to full system compromise.

Mitigation

Upgrade to version 3.23.0 or later.

References

https://github.com/FreeRDP/FreeRDP/commit/7d8fdce2d0ef337cb86cb37fc0c436c905e04d77
https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-mr6w-ch7c-mqqj

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Details

CVE ID: CVE-2026-26955
Severity: High
CVSS Score: 8.8
Type: buffer_overflow
Status: new

CWE

CWE-787

CVSS Metrics

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H