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Δ / VULNERABILITY RECORD

CVE-2025-54126.

Source-reported disclosure and enrichment record.

SEVERITY / CVSSMEDIUM / 5.3No severity score in this snapshot.
EXPLOITATION STATUSNot listed in the cached KEV catalogThis does not establish absence of exploitation.
RECORD STATUSMicrosoft vendor recordModified Sep 03, 2025

Disclosure summary

WebAssembly Micro Runtime's `--addr-pool` option allows all IPv4 addresses when subnet mask is not specified

Source-reported weakness categories

CWE-668

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-Jul

Open original source · Updated Sep 03, 2025

WebAssembly Micro Runtime's `--addr-pool` option allows all IPv4 addresses when subnet mask is not specified

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

Microsoft maximum product score: 5.3

VendorProduct / associationVersion / bounds
Microsoft update guideazl3 fluent-bit 3.1.9-4 on Azure Linux 3.0 (MSRC status code 3)
Microsoft update guidecbl2 fluent-bit 3.0.6-2 on CBL Mariner 2.0 (MSRC status code 3)
Microsoft update guidecbl2 fluent-bit 3.0.6-3 on CBL Mariner 2.0 (MSRC status code 3)
Microsoft update guideazl3 fluent-bit 3.1.9-5 on Azure Linux 3.0 (MSRC status code 3)

Vendor remediation references

  • CBL-Mariner Releases · build 3.1.9-5 · product IDs 19445-17084, 20420-17084
  • Vendor guidance · product IDs 19445-17084, 20420-17084
  • CBL-Mariner Releases · build 3.0.6-3 · product IDs 19787-17086, 20380-17086
  • Vendor guidance · product IDs 19787-17086, 20380-17086

Original records & references

PUBLISHED 2025-09-03T23:22:55-04:00
MODIFIED 2025-09-03T23:22:55-04:00
INGESTED 2026-10-08T12:45:47-04:00