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Findings

CVE-2018-20250

WinRAR Absolute Path Traversal Vulnerability

Published Feb 5, 2019 · updated Aug 12, 2026 · rarlab winrar

In WinRAR versions prior to and including 5.61, There is path traversal vulnerability when crafting the filename field of the ACE format (in UNACEV2.dll). When the filename field is manipulated with specific patterns, the destination (extraction) folder is ignored, thus treating the filename as an absolute path.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Feb 5, 2019 · Catalog

    Detected

    In WinRAR versions prior to and including 5.61, There is path traversal vulnerability when crafting the filename field of the ACE format (in UNACEV2.dll). When the filename field is manipulated with specific patterns, the destination (extraction) folder is ignored, thus treating the filename as an absolute path.

  2. Feb 15, 2022 · CISA KEV

    Known exploited

    Apply updates per vendor instructions.

  3. Aug 15, 2022 · CISA KEV

    Remediation due

    Apply updates per vendor instructions.

  4. Aug 12, 2026 · Catalog

    Updated

    In WinRAR versions prior to and including 5.61, There is path traversal vulnerability when crafting the filename field of the ACE format (in UNACEV2.dll). When the filename field is manipulated with specific patterns, the destination (extraction) folder is ignored, thus treating the filename as an absolute path.

Required action

Apply updates per vendor instructions.

CISA due date Aug 15, 2022

Affected

  • cpe rarlab/winrarversion unspecified
  • vendor RARLAB WinRARversion unspecified

Sources

  • CISA KEVConfirmed exploitationCVE-2018-20250

    WinRAR Absolute Path Traversal vulnerability leads to Remote Code Execution

    cisa.gov
  • CVE.orgVulnerability recordCVE-2018-20250

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2018-20250

    30-day exploitation probability 96.0%

    first.org
  • Exploit DatabasePublic exploit reference46552

    Public archive entry. The exploit body is not stored here.

    exploit-db.com
  • Exploit DatabasePublic exploit reference46756

    Public archive entry. The exploit body is not stored here.

    exploit-db.com
  • Metasploit ModulesPublic exploit moduleexploit_windows/fileformat/winrar_ace

    Public module reference (excellent). Module source is not copied into this catalog.

    rapid7.com
  • NIST NVDVulnerability recordCVE-2018-20250

    In WinRAR versions prior to and including 5.61, There is path traversal vulnerability when crafting the filename field of the ACE format (in UNACEV2.dll). When the filename field is manipulated with specific patterns, the destination (extraction) folder is ignored, thus treating

    nvd.nist.gov
  • Packet Storm SecurityCited referencehttp://packetstormsecurity.com/files/152618/RARLAB-WinRAR-ACE-Format-Input-Validation-Remote-Code-Execution.html

    Packet Storm link already published on the finding.

    packetstormsecurity.com

References