CVE-2025-40775

HIGH EPSS 95.3%

Published May 21, 20251y ago · Modified Jun 17, 20261w ago

7.5 CVSS 3.1

High

Published May 21, 2025 1y ago

Last Modified Jun 17, 2026 1w ago

Description

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 through 9.20.8 and 9.21.0 through 9.21.7.

CVSS Details

Base Score

7.5

Exploitability

3.9

Impact

3.6

Vector string

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector Network

Attack Complexity Low

Privileges Required None

User Interaction None

Scope Unchanged

Confidentiality None

Integrity None

Availability High

Threat Intelligence

EPSS Exploit Probability

95.3% percentile

Exploit & Patch Status

No Known Exploit

No Patch Available

Weaknesses 1

CWE-232

References 3

openwall.com http://www.openwall.com/lists/oss-security/2025/05/21/1
kb.isc.org https://kb.isc.org/docs/cve-2025-40775
security.netapp.com https://security.netapp.com/advisory/ntap-20250523-0001/

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.