CVE-2026-55201

What it is

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.

At a glance

Exploitability

Can be exploited over the network without logging in, but needs a user to act. High risk of data exposure, data tampering.

Exploit odds

0.3% chance of exploitation in the next 30 days (EPSS).

Fix

A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

1. 2026-06-17 20:17 UTC PublishedDisclosed publicly on CVE.org and NVD
2. 2026-10-26 12:10 UTC Last updatedMost recent change to the record

Details

Published

2026-06-17 20:17 UTC

Last modified

2026-10-26 12:10 UTC

Exploit probability

0.3% · EPSS, next 30 days

Weakness

CWE-22 · Path traversal

Record status

Awaiting Analysis

Attack profile CVSS 4.0 · 7.4

Attack vector

Network

Complexity

Low

Attack requirements

Present

Privileges needed

None

User interaction

Active

Confidentiality

High

Integrity

High

Availability

None