CVE-2025-407757.5HighCWE-232

CVE-2025-40775: DNS message with invalid TSIG causes an assertion failure

ISC · BIND 9

Vendor fix available · Affected: ISC BIND 9 · Exploitation: likely to be exploited (10% or more)

Not in CyberSIXT coverage yet: no article names this CVE. This page shows the public record.

15.4%probability of exploitation in the next 30 days

96th percentile

050100

Higher than 96% of scored CVEs

7.5HighCVSS 3.1

LowMediumHighCrit.

DescriptionCVE.org

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.

Affected products1

From the CVE record. A product or version that is not listed is unknown, not unaffected.

ISC · BIND 9from 9.20.0 up to and including 9.20.8; from 9.21.0 up to and including 9.21.7

On the Atlas

Every published CVE is on the CyberSIXT Atlas, grouped by weakness, vendor and month.

Open the Atlas

Exploitation: Likely to be exploited (10% or more). EPSS gives it a 10% or higher chance of exploitation in the next 30 days.
CISA KEV: Not listed
Public check: No public nuclei template
Weakness: Improper Handling of Undefined Values · Input Validation and Logic
Vendor: ISC
Published: May 2025
Band: Likely to be exploited (10% or more), May 2025

CoverageNo articles yet

No CyberSIXT article names CVE-2025-40775 yet, so there is no coverage timeline, action brief or change log for it. Everything on this page comes from the public CVE record, CISA KEV, EPSS and the nuclei template index. Search the archive or see the CVEs in the news.