CVE-2026-55201

CVE-2026-55201 is a high-severity vulnerability rated 7.4/10 on the CVSS scale. 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.. EPSS estimates a 0.30% chance of exploitation in the next 30 days.