CVE-2018-20250
HIGHCISA KEVEPSS 100th pctlDescription
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.
CVSS v3 Vector
Exploitability
Impact
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Exploit Intelligence
Very high risk: more likely to be exploited than 100% of all known CVEs.
WinRAR Absolute Path Traversal Vulnerability
WinRAR Absolute Path Traversal vulnerability leads to Remote Code Execution
Apply updates per vendor instructions.
Remediation due: 2022-08-15
Associated with ransomware campaigns
References
- http://packetstormsecurity.com/files/152618/RARLAB-WinRAR-ACE-Format-Input-Validation-Remote-Code-Execution.html
- http://www.rapid7.com/db/modules/exploit/windows/fileformat/winrar_ace
- http://www.securityfocus.com/bid/106948
- https://github.com/blau72/CVE-2018-20250-WinRAR-ACE
- https://research.checkpoint.com/extracting-code-execution-from-winrar/
- https://www.exploit-db.com/exploits/46552/
- https://www.exploit-db.com/exploits/46756/
- https://www.win-rar.com/whatsnew.html
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2018-20250
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Start freeThis product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2025-10-31.