WinRAR Path Traversal Vulnerability CVE-2025-8088

Historical catalog analysis: CISA added this entry on August 12, 2025. The entry reflects catalog information retrieved on August 31, 2026, not a snapshot archived on the inclusion date. Check current vendor guidance before acting.

What the vulnerability is

CVE-2025-8088 is a path traversal vulnerability (CWE-35) affecting the Windows version of RARLAB WinRAR. The flaw allows an attacker to execute arbitrary code if a user interacts with a specially crafted malicious archive file.

Exposure and applicability

This vulnerability applies specifically to organizations deploying WinRAR on Windows endpoints. Because this flaw is identified as being used in known ransomware campaigns, the risk profile is elevated for any environment where users are permitted to download and extract archives from untrusted sources. Infrastructure owners should prioritize identifying all instances of WinRAR across the fleet, including unauthorized or “shadow IT” installations.

Remediation priorities

Based on the reported exploitation status, we analyze the following priority actions:

1. Immediate Patching: Apply vendor-supplied mitigations as specified by RARLAB. This is the primary method to address the root cause of the path traversal.
2. Software Inventory and Removal: Identify systems where WinRAR is not a business requirement and discontinue its use entirely to eliminate the attack surface.
3. Cloud Service Review: For organizations utilizing cloud-based file processing or storage, follow BOD 22-01 guidance to ensure that shared services are not exposing the environment to this vulnerability via processed archives.

How to validate remediation

Verification must move beyond a simple version check, as a deployed update does not always guarantee a successful configuration or active protection. We recommend the following validation approach:

• Deployment Confirmation: Use asset management tools to verify that the patched version is active across all endpoints.
• Configuration Audit: Ensure that no legacy, unpatched versions of WinRAR remain in secondary directories or user-profile folders where they might be executed instead of the system-wide updated version.
• Execution Testing: In a controlled, isolated sandbox environment, security teams can verify if the application still handles malformed paths as expected according to vendor documentation, ensuring the mitigation is functionally active.

Limits and open questions

While patching reduces the likelihood of exploitation, residual risk remains. Path traversal vulnerabilities often rely on user interaction (opening a file); therefore, technical mitigations do not eliminate the risk posed by social engineering. It remains unknown exactly which versions are affected beyond the general Windows product line, and defenders should refer to RARLAB’s specific versioning for precise applicability.

Source and editorial note

CVE-2025-8088: RARLAB WinRAR Path Traversal Vulnerability · Source date: August 12, 2025 · Retrieved August 31, 2026.

Material facts are tied to the cited primary source. Recommendations are independent defensive analysis unless attributed to the source. Confirm consequential decisions against current authoritative guidance.

Archive date: August 15, 2025. The displayed post date is assigned three days after the source date to organize this retrospective archive; it does not mean this site published the analysis then. First published by this site: October 06, 2026 at 00:17 UTC.

Request a Vulnerability Assessment