HIGH 7.5 Microsoft PoC
CVE-2025-40775
DNS message with invalid TSIG causes an assertion failure
Microsoft Security Update 2025-May: DNS message with invalid TSIG causes an assertion failure
Affected Products
- azl3 bind 9.20.9-1 on Azure Linux 3.0
- azl3 bind 9.20.5-4 on Azure Linux 3.0
References
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-40775
- https://nvd.nist.gov/vuln/detail/CVE-2025-40775
This high severity vulnerability with a CVSS score of 7.5 was published on 2025-05-13 via Microsoft. 🚨 A public proof-of-concept exploit is available on GitHub. EPSS score: 15.2% (top 3% of all CVEs by exploitation probability). Affected: azl3 bind 9.20.9-1 on Azure Linux 3.0, azl3 bind 9.20.5-4 on Azure Linux 3.0.
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