CVE-2025-6218: RARLAB WinRAR Path Traversal Vulnerability

RARLAB WinRAR contains a path traversal vulnerability tracked as CVE-2025-6218. An attacker can leverage this flaw to execute code in the context of the current user. This matters because successful exploitation grants an attacker the ability to run arbitrary code under the privileges of the logged-in user, which can lead to further system access or data access on affected endpoints.

How it works

The weakness is classified as CWE-22, improper limitation of a pathname to a restricted directory. An attacker supplies specially crafted archive content that uses traversal sequences to write or access files outside the intended extraction directory.

When WinRAR processes the archive, the flawed path handling allows the resulting file operations to occur in locations the user account can reach, resulting in code execution within that user context. No further exploit mechanics are documented in the available summary.

Am I affected? How to find it in your systems

WinRAR is a desktop file archive utility that runs on Windows endpoints. Begin by inventorying all systems where the application is installed through endpoint management platforms, software inventory tools, or manual checks of the Program Files directories and Add/Remove Programs lists.

• Identify any WinRAR installations and note the exact version numbers present.
• Examine default or custom extraction paths configured in the application or in user scripts that invoke WinRAR.
• Review logs or telemetry for archive extraction events that produce files in unexpected directories or that coincide with subsequent process execution.

Specific affected versions and configurations must be confirmed against the vendor advisory.

How to remediate

Apply the vendor-supplied update referenced in the advisory as the primary remediation step. After patching, review and restrict the directories to which WinRAR is permitted to write, and limit the use of archive files from untrusted sources.

• Enforce least-privilege execution for user accounts that handle archives.
• Disable automatic extraction features where they are not required.
• Validate any custom automation that calls WinRAR to ensure path inputs are normalized before processing.

If you can't patch immediately

Until the update can be deployed, apply network or host-based segmentation to isolate systems that must continue using WinRAR. Monitor endpoint logs for unexpected file writes or new processes spawned after archive operations. If vendor mitigations cannot be implemented, discontinue use of the product in accordance with CISA guidance.

If your data may have been exposed

Actively exploited vulnerabilities can lead to breaches. Review relevant endpoint and file-access logs for indicators of compromise and consider running a free exposure scan of organizational email addresses against known breach data.