PT-2026-34838 · Freerdp · Freerdp

Published 2026-04-24 · Updated 2026-04-24 · CVE-2026-40254

NVD

CVSS v3.1

4.2

Medium

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

FreeRDP is a free implementation of the Remote Desktop Protocol. Versions prior to 3.25.0 have an off-by-one in the path traversal filter in channels/drive/client/drive file.c. The contains dotdot() function catches ../ and .. mid-path but misses .. when it's the last component with no trailing separator. A rogue RDP server can read, list, or write files one directory above the client's shared folder through RDPDR requests. This requires the victim to connect with drive redirection enabled. Version 3.25.0 patches the issue.

Fix

Weakness Enumeration

CWE-193

Related Identifiers

CVE-2026-40254

Affected Products

Freerdp

References · 2

• https://nvd.nist.gov/vuln/detail/CVE-2026-40254 · Security Note
• https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-3xpj-m4hx-8vmx · Note