# CVE-2018-20250: WinRAR Absolute Path Traversal Vulnerability

> CVE-2018-20250: WinRAR Absolute Path Traversal Vulnerability. CVSS 7.8 (CVSS 3.1), in CISA KEV.

Canonical: https://rewindex.com/cve/CVE-2018-20250
Last updated: 2026-08-13T03:55:27Z

- Published: 2019-02-05 20:00 UTC · Updated: 2026-08-13 03:55 UTC · Assigner: checkpoint
- CVSS: 7.8 (CVSS 3.1) · Severity: High · Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- EPSS: 96.0%, 100th percentile (scored 2026-10-25)
- CISA KEV: yes, added 2022-02-15, federal due date 2022-08-15, ransomware use: Known
- CWE: CWE-36

## Description

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.

## CISA required action

Apply updates per vendor instructions.

## Affected vendors and products

- Check Point Software Technologies Ltd.: WinRAR

## References

- [CVE record on cve.org](https://www.cve.org/CVERecord?id=CVE-2018-20250)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2018-20250)
- [http://packetstormsecurity.com/files/152618/RARLAB-WinRAR-ACE-Format-Input-Validation-Remote-Code-Execution.html](http://packetstormsecurity.com/files/152618/RARLAB-WinRAR-ACE-Format-Input-Validation-Remote-Code-Execution.html)
- [https://github.com/blau72/CVE-2018-20250-WinRAR-ACE](https://github.com/blau72/CVE-2018-20250-WinRAR-ACE)
- [https://research.checkpoint.com/extracting-code-execution-from-winrar/](https://research.checkpoint.com/extracting-code-execution-from-winrar/)
- [https://www.exploit-db.com/exploits/46552/](https://www.exploit-db.com/exploits/46552/)
- [https://www.exploit-db.com/exploits/46756/](https://www.exploit-db.com/exploits/46756/)
- [https://www.win-rar.com/whatsnew.html](https://www.win-rar.com/whatsnew.html)
- [http://www.rapid7.com/db/modules/exploit/windows/fileformat/winrar\_ace](http://www.rapid7.com/db/modules/exploit/windows/fileformat/winrar_ace)
- [http://www.securityfocus.com/bid/106948](http://www.securityfocus.com/bid/106948)

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_Sources: CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (https://www.cve.org/) This product uses data from the NVD API but is not endorsed or certified by the NVD. (https://nvd.nist.gov/) Known Exploited Vulnerabilities catalog from CISA. (https://www.cisa.gov/known-exploited-vulnerabilities-catalog) EPSS scores from FIRST (Exploit Prediction Scoring System). (https://www.first.org/epss/)_


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Canonical: https://rewindex.com/cve/CVE-2018-20250 · Markdown: https://rewindex.com/cve/CVE-2018-20250.md · JSON: https://rewindex.com/api/v1/cves/CVE-2018-20250 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T02:13:46.140Z