CVE-2018-20250In 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).
Updated under an hour ago ()
Does this affect you?
It affects Check Point Software Technologies Ltd. WinRAR and 1 other product. Add what you run to find out whether that includes you.
CISA lists it as known exploited since Feb 15, 2022; federal agencies had to remediate by Aug 15, 2022, and it is known to be used in ransomware. Treat that date as your deadline.
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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
- 7.8 HIGH (v3.1, CISA ADP)CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- Weakness (CWE)
- CWE-36
- Known exploited
- Added to CISA KEV Feb 15, 2022; federal remediation due Aug 15, 2022; known ransomware useApply updates per vendor instructions.
- EPSS (exploitation in the next 30 days)
- 96.00% (percentile 100)
- Assigned by
- checkpoint
- NVD analysis
- Analyzed
- Record last updated
- Aug 13, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Check Point Software Technologies Ltd. WinRAR check_point_software_technologies:winrar (from the name) | All versions prior and including 5.61 | CNA record |
rarlab winrar rarlab:winrar | through 5.61 | NVD |
References
- https://github.com/blau72/CVE-2018-20250-WinRAR-ACEx-refsource-misc, exploit, third-party-advisory
- https://research.checkpoint.com/extracting-code-execution-from-winrar/x-refsource-misc, exploit, press/media-coverage, third-party-advisory
- https://www.exploit-db.com/exploits/46552/exploit, x-refsource-exploit-db, third-party-advisory, vdb-entry
- http://www.securityfocus.com/bid/106948vdb-entry, x-refsource-bid, broken-link, third-party-advisory
- https://www.win-rar.com/whatsnew.htmlx-refsource-misc, release-notes
- http://packetstormsecurity.com/files/152618/RARLAB-WinRAR-ACE-Format-Input-Validation-Remote-Code-Execution.htmlx-refsource-misc, exploit, third-party-advisory, vdb-entry
- http://www.rapid7.com/db/modules/exploit/windows/fileformat/winrar_acex-refsource-misc, third-party-advisory
- https://www.exploit-db.com/exploits/46756/exploit, x-refsource-exploit-db, third-party-advisory, vdb-entry
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2018-20250us-government-resource
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.