Security readout for executives and security teams
Plain-English summary
WinRAR can mishandle file paths inside a malicious archive, letting attackers place content in unintended locations and run code as the logged-in user. Exploitation requires user interaction, such as opening a malicious file or visiting a malicious page. CISA KEV status makes this an urgent endpoint exposure issue.
Executive priority
Treat this as high priority because WinRAR is common on endpoints, exploitation is KEV-confirmed, and compromise runs as the current user. Remediate exposed installations quickly and reduce user exposure to untrusted archives while confirming vendor-specific version guidance.
Technical view
CVE-2025-6218 is a CWE-22 directory traversal flaw in RARLAB WinRAR archive path handling. A crafted archive path can traverse outside the expected extraction directory. ZDI describes arbitrary code execution in the current user context, with no privileges required but user interaction required.
Likely exposure
Likely exposure is Windows endpoints where RARLAB WinRAR is installed, especially the source-named WinRAR 7.11 64-bit. The bundle does not establish every affected version, so teams should inventory WinRAR versions and verify scope against RARLAB and CVE guidance.
Exploitation context
Active exploitation is supported by the CISA KEV listing. ZDI states exploitation requires the target to open a malicious file or visit a malicious page. Third-party sources in the bundle discuss APT-C-08 activity, but avoid assuming local exposure without inventory evidence.
Researcher notes
The strongest source-backed facts are directory traversal, current-user code execution, user interaction requirement, CVSS 7.8, and KEV status. The source bundle names WinRAR 7.11 64-bit but does not provide full affected-version boundaries or fixed-version text, so preserve that uncertainty.
Mitigation direction
- Follow RARLAB vendor guidance and update or remove affected WinRAR installations.
- Restrict opening archives from untrusted sources until remediation is complete.
- Prioritize endpoints used for email, web downloads, helpdesk, and file intake.
- Use application control to limit unexpected execution from archive extraction locations.
- Increase monitoring for suspicious child processes spawned after archive handling.
Validation and detection
- Inventory endpoints for RARLAB WinRAR and record installed versions.
- Confirm whether WinRAR 7.11 64-bit exists in managed endpoint data.
- Check RARLAB advisory and CVE record for affected and fixed version details.
- Review EDR telemetry for suspicious execution following archive opens or extractions.
- Validate user-facing file intake workflows that process external archives.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-22: File access and web shell behavior lookup
File traversal and upload weaknesses can lead teams to review file, web shell, execution, and collection telemetry. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupExecution behavior lookup
The CVE wording references code or command execution, so execution technique review may help defensive triage. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupFile access behavior lookup
The CVE wording references file access or upload behavior, so file telemetry and web shell review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2025-6218 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- High
- CVSS
- 7.8 (3.0)
- Known Exploited
- Yes
- Published
Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CISA KEV status
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H1.85.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.0 score
7.8HighVector: CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- ZDI-25-409CVE reference · x_research-advisory
- vendor-provided URLCVE reference · vendor-advisory
- https://www.secpod.com/blog/archive-terror-dissecting-the-winrar-cve-2025-6218-exploit-apt-c-08s-stealth-move/CVE reference · third-party-advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-6218CVE reference · government-resource
- https://foresiet.com/blog/apt-c-08-winrar-directory-traversal-exploit/CVE reference · third-party-advisory
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.