CVE-2018-20250 — WinRAR Absolute Path Traversal Vulnerability

Triage

Is it exploited, how likely is exploitation, what does it touch, and how severe do the sources call it.

CISA SSVC assessment CISA

Three decision points CISA publishes for the CVEs it assesses (SSVC 2.0.3). A stakeholder decision, not a severity score.

Remediation

Fixes and mitigations documented by the sources — linked to the original advisory.

No fix documented by the sources we poll. That does not mean none exists: check the vendor advisory.

CISA required action CISA

Apply updates per vendor instructions.

US federal deadline: Aug 15, 2022 — passed 1522 day(s) ago

First 24 hours

Ordered from the record’s own fields — exposure first, because you cannot patch what you have not found. A rule-generated starting point.

1. Identify exposed assets running the affected vendor/product/version combinations (Checkpoint WinRAR, Rarlab Winrar).
2. Treat as emergency remediation: the CVE is in CISA KEV (confirmed exploitation).
3. No fix documented in the sources: reduce exposure and monitor the vendor advisory.
4. Exploitation requires user interaction: tighten email/web filtering and warn affected users.
5. EPSS ahead of 100% of scored CVEs: prioritize it in the patch queue.
6. Search available logs for exploit probes matching the vulnerability class (file handling), errors and authentication anomalies.

Affected scope

Vendor, product and versions as the sources word them.

Attack characteristics

The CVSS vector, decoded. It describes the attack, not your exposure to it.

Every base score collected

Sources score independently and may disagree; each row says who scored it and under which version.

Weakness MITRE

Weakness class according to MITRE’s CWE catalog.

CWE-22 · Path Traversal

Other CVEs with this weakness →

CISA KEV details CISA

CISA lists a CVE once it has evidence of exploitation against real targets.

CISA records ransomware use only for campaigns it has confirmed, so “Unknown” means unrecorded, not ruled out. The deadline binds US federal agencies; for everyone else it is a reference date.

Public exploits, PoCs and detection templates

Public code that demonstrates or tests the flaw raises the odds of mass exploitation — and Nuclei templates help find vulnerable assets in your environment.

Warning: public PoCs are sometimes disguised malware. Use them only for authorized testing in an isolated environment. This portal does not host exploit code — it only points to the sources.

Threat actors exploiting this CVE MITRE ATT&CK

According to MITRE ATT&CK.

EPSS over time FIRST

Oct 13, 2026 → Oct 14, 2026 · 2 reading(s) · max 96.00%

Detection

Read off the CVSS vector and the weakness class. Starting points, not tested rules.

• Local/physical vector: focus on endpoint telemetry (EDR) from affected hosts.
• Monitor file creation in web directories and paths with traversal sequences (../).
• Hunt retroactively in logs from before Feb 15, 2022 (KEV listing): exploitation may have started earlier.

Timeline

What happened to this CVE, newest first.

• 2026
• Affected products added · check point software technologies ltd./winrar
  Oct 13, 2026 · CVE Program (cve.org) e CISA ADP
• SSVC assessment updated
  Oct 13, 2026 · CVE Program (cve.org) e CISA ADP
• Record published
  Oct 13, 2026
• Affected products added · rarlab/winrar
  Oct 13, 2026 · NIST National Vulnerability Database
• CVSS changed · 7.8
  Oct 13, 2026 · NIST National Vulnerability Database
• Source status changed · → Analyzed
  Oct 13, 2026 · NIST National Vulnerability Database
• Added to CISA KEV (detected)
  Oct 13, 2026 · CISA Known Exploited Vulnerabilities
• Record created in this database
  Oct 13, 2026 · CISA Known Exploited Vulnerabilities
• 2022
• Added to CISA KEV catalog
  Feb 14, 2022 · CISA
• 2019
• CVE published
  Feb 5, 2019 · checkpoint

Source activity

Repeated readings are counted rather than listed.

• 2× References added · Oct 13, 2026 – Oct 13, 2026
• 1× Official description updated · Oct 13, 2026 – Oct 13, 2026

References

14 on the record

• www.cisa.gov/known-exploited-vulnerabilities-catalog
  US Government Resource, NIST National Vulnerability Database
• research.checkpoint.com/extracting-code-execution-from-winrar
  GitHub Security Advisories
• nvd.nist.gov/vuln/detail/CVE-2018-20250
  GitHub Security Advisories
• research.checkpoint.com/extracting-code-execution-from-winrar/
  Exploit, Press/Media Coverage, Third Party Advisory, x_refsource_MISC, NIST National Vulnerability Database
• www.exploit-db.com/exploits/46552
  GitHub Security Advisories
• www.exploit-db.com/exploits/46756/
  Exploit, Third Party Advisory, VDB Entry, exploit, x_refsource_EXPLOIT-DB, NIST National Vulnerability Database
• www.win-rar.com/whatsnew.html
  Release Notes, x_refsource_MISC, NIST National Vulnerability Database
• www.exploit-db.com/exploits/46552/
  Exploit, Third Party Advisory, VDB Entry, exploit, x_refsource_EXPLOIT-DB, NIST National Vulnerability Database
• www.exploit-db.com/exploits/46756
  GitHub Security Advisories
• www.rapid7.com/db/modules/exploit/windows/fileformat/winrar_ace
  Third Party Advisory, x_refsource_MISC, NIST National Vulnerability Database
• github.com/blau72/CVE-2018-20250-WinRAR-ACE
  Exploit, Third Party Advisory, x_refsource_MISC, NIST National Vulnerability Database
• www.securityfocus.com/bid/106948
  Broken Link, Third Party Advisory, VDB Entry, vdb-entry, x_refsource_BID, NIST National Vulnerability Database
• packetstormsecurity.com/files/152618/RARLAB-WinRAR-ACE-Format-Input-Validation-Remote-Code-Ex
  Exploit, Third Party Advisory, VDB Entry, x_refsource_MISC, NIST National Vulnerability Database
• github.com/advisories/GHSA-7v9q-j964-43qc
  GitHub Security Advisories

Elsewhere on this site

Related CVEs (same products)

• Medium CVE-2019-25677 WinRAR 5.61 Denial of Service via Malformed Language File Apr 5, 2026
• Medium CVE-2025-52331 Cross-site Scripting (XSS) in Rarlab Winrar Nov 12, 2025
• High CVE-2025-8088 RARLAB WinRAR Path Traversal Vulnerability KEV Aug 8, 2025
• High CVE-2025-6218 RARLAB WinRAR Path Traversal Vulnerability KEV Jun 20, 2025
• High CVE-2023-38831 RARLAB WinRAR Code Execution Vulnerability KEV Aug 23, 2023

Not in any source we poll

Listed rather than left blank: an empty field and an unmeasured one look identical on screen, and only one is a reason to look elsewhere.

• No fixed version, patch or mitigation documented.
• No confirmed IOCs, IP addresses, domains, file hashes, or malware artifacts supplied.
• No organization-specific asset inventory, compensating-control status, or patch deployment evidence supplied.
• No exploit packet captures, log samples, or incident case IDs supplied.

Answered from this record

Text assembled only from the fields above — no additional claims.

What should defenders know first?

CVE-2018-20250 is "WinRAR Absolute Path Traversal Vulnerability", rated High. It affects WinRAR (Checkpoint); versions are in the scope table. It is in CISA KEV: there is evidence of real-world exploitation. CVSS 7.8 describes technical severity. EPSS 96.00% estimates the probability of exploitation in 30 days; neither replaces your asset context. First verify whether exposed or business-critical assets run the affected versions, apply vendor fixes or mitigations, and preserve logs for review.

Comments

Moderated technical discussion. Read the community guidelines.

No comments yet.

Sign in or create an account to comment and suggest corrections.