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Δ / VULNERABILITY RECORD

CVE-2025-4138.

Source-reported disclosure and enrichment record.

SEVERITY / CVSSHIGH / 8.1No severity score in this snapshot.
EXPLOITATION STATUSNot listed in the cached KEV catalogThis does not establish absence of exploitation.
RECORD STATUSMicrosoft vendor recordModified Aug 12, 2026

Disclosure summary

Bypassing extraction filter to create symlinks to arbitrary targets outside extraction directory

Source-reported weakness categories

CWE-22

Source-specific records & product guidance

Sources retain their own attribution and scoring. Follow the original record to confirm affected versions, fixed releases, and configuration conditions.

Microsoft Security Updates (CVRF) · 2025-Jun

Open original source · Updated Aug 12, 2026

Bypassing extraction filter to create symlinks to arbitrary targets outside extraction directory

Maximum of vendor-reported product scores; products and fixed builds are associations, not a universal affected-version statement.

Microsoft maximum product score: 8.1

VendorProduct / associationVersion / bounds
Microsoft update guidecbl2 python3 3.9.19-14 on CBL Mariner 2.0 (MSRC status code 3)
Microsoft update guidecbl2 python3 3.9.19-13 on CBL Mariner 2.0 (MSRC status code 3)
Microsoft update guideazl3 python3 3.12.9-1 on Azure Linux 3.0 (MSRC status code 3)
Microsoft update guidecbl2 python3 3.9.19-13 on CBL-Mariner 2.0 (MSRC status code 3)

Vendor remediation references

  • CBL-Mariner Releases · build 3.9.19-14 · product IDs 19533-16823, 19681-17086, 19681-21692
  • Vendor guidance · product IDs 19533-16823, 19681-17086, 19681-21692
  • CBL-Mariner Releases · build 3.12.9-2 · product IDs 17604-17084
  • Vendor guidance · product IDs 17604-17084

Original records & references

PUBLISHED 2025-07-10T20:00:00-04:00
MODIFIED 2026-08-12T19:49:29-04:00
INGESTED 2026-10-08T12:50:04-04:00