Cyber Resilience

CVE-2025-40775

High

Published: 21 May 2025

Published
21 May 2025
Modified
15 April 2026
KEV Added
—
Patch
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CVSS Score v3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS Score 0.0018 39.7th percentile
Risk Priority 15 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2025-40775 is a high-severity Improper Handling of Undefined Values (CWE-232) vulnerability. Its CVSS base score is 7.5 (High).

Operationally, ranked at the 39.7th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

EU & UK References

Vulnerability details

When an incoming DNS protocol message includes a Transaction Signature (TSIG), BIND always checks it. If the TSIG contains an invalid value in the algorithm field, BIND immediately aborts with an assertion failure. This issue affects BIND 9 versions 9.20.0…

more

through 9.20.8 and 9.21.0 through 9.21.7.

CWE(s)
CWE-232

Related Threats

No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.

Affected Assets

Mitigating Controls

No mitigating controls mapped yet. The per-CVE control annotator has not reached this CVE.

References