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PatchSiren cyber security CVE debrief

CVE-2025-6218 RARLAB CVE debrief

CVE-2025-6218 is a RARLAB WinRAR path traversal vulnerability that CISA added to the Known Exploited Vulnerabilities catalog on 2025-12-09. The KEV listing indicates known exploitation and directs organizations to apply vendor mitigations, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable. The supplied source corpus does not provide a CVSS score or version-specific impact details.

Vendor
RARLAB
Product
WinRAR
CVSS
HIGH 7.8
CISA KEV
Listed
Original CVE published
2025-12-09
Original CVE updated
2025-12-09
Advisory published
2025-12-09
Advisory updated
2025-12-09

Who should care

Organizations that use WinRAR on endpoints or servers, along with vulnerability management, endpoint security, and incident response teams. This is especially important where archive handling is automated or where systems process untrusted files.

Technical summary

The official information supplied here identifies CVE-2025-6218 as a path traversal issue in RARLAB WinRAR and places it in CISA’s KEV catalog. In practice, that means the vulnerability is considered actively exploited and should be treated as time-sensitive. The corpus does not include affected-version granularity, exploit mechanics, or a CVSS score, so remediation should be driven by the vendor advisory referenced in the KEV entry and by CISA’s required-action guidance.

Defensive priority

High

Recommended defensive actions

  • Inventory all WinRAR installations and determine exposure across endpoints, servers, and managed devices.
  • Review the official WinRAR vendor advisory referenced in the CISA KEV entry and apply the recommended mitigations or updates as soon as possible.
  • Prioritize remediation ahead of the CISA due date of 2025-12-30.
  • If mitigations are unavailable, discontinue use of the product as directed by CISA.
  • Monitor for unusual file extraction behavior, unexpected filesystem writes outside intended extraction paths, and other signs of suspicious archive processing.
  • Update vulnerability management records to reflect the KEV status and track remediation to closure.

Evidence notes

All conclusions above are limited to the supplied official sources: the CISA KEV entry and the linked CVE/NVD records. The source corpus shows CVE published and modified on 2025-12-09, with CISA’s KEV dateAdded also on 2025-12-09 and dueDate on 2025-12-30. The corpus identifies the issue as a WinRAR path traversal vulnerability and marks it as known exploited, but does not supply a CVSS score or affected-version details.

Sources and references

Verified primary and authoritative sources

  • CVE-2025-6218 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2025-6218

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2025-6218 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2025-6218

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

  • CISA Known Exploited Vulnerabilities catalog

    Publisher, destination, and source semantics verified

    URL: https://www.cisa.gov/known-exploited-vulnerabilities-catalog

    Cybersecurity and Infrastructure Security Agency - Official CISA catalog of vulnerabilities known to be exploited in the wild.

Supplemental references

  • Source item URL

    Unverified legacy reference

    URL: https://www.cisa.gov/sites/default/files/feeds/known_exploited_vulnerabilities.json

    cisa_kev

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.