CVE-2026-55201
Evil-WinRM through 3.9, fixed in commit 6ecd570, contains a path traversal vulnerability in the download_dir() function that allows a rogue or compromised remote Windows server to write files outside the intended download directory by returning filenames with traversal sequences from Get-ChildItem command output that are passed unsanitized to File.join(). Attackers controlling the remote server can exploit this to overwrite sensitive client-side files such as SSH authorized_keys or shell configuration files, achieving persistent access or privilege escalation on the client machine.
- Score
- CVSS 4.0 7.4 High
- Status
- Awaiting Analysis - disclosure@vulncheck.com
- Published
- 2026-06-17
- Last modified
- 2026-10-26
- Weaknesses
- CWE-22
Affected products
References
- https://github.com/Hackplayers/evil-winrm/pull/81
- https://github.com/Hackplayers/evil-winrm/commit/6ecd570a298562dc72ad73978307eb34182f5850
- https://www.vulncheck.com/advisories/evil-winrm-path-traversal-in-download-dir-function
