# CVE-2025-40778

## Summary

- **CVE ID:** CVE-2025-40778
- **Severity:** HIGH
- **CVSS Score:** 8.6 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N)
- **CWE:** CWE-349
- **Published:** Oct 22, 2025
- **Last Modified:** Mar 12, 2026

## Description

Under certain circumstances, BIND is too lenient when accepting records from answers, allowing an attacker to inject forged data into the cache.
This issue affects BIND 9 versions 9.11.0 through 9.16.50, 9.18.0 through 9.18.39, 9.20.0 through 9.20.13, 9.21.0 through 9.21.12, 9.11.3-S1 through 9.16.50-S1, 9.18.11-S1 through 9.18.39-S1, and 9.20.9-S1 through 9.20.13-S1.

## Affected Products

- ISC — BIND 9 (9.11.0)
- ISC — BIND 9 (9.18.0)
- ISC — BIND 9 (9.20.0)
- ISC — BIND 9 (9.21.0)
- ISC — BIND 9 (9.11.3-S1)
- ISC — BIND 9 (9.18.11-S1)
- ISC — BIND 9 (9.20.9-S1)

## References

- [CNA](https://kb.isc.org/docs/cve-2025-40778)
- [CISA-ADP](https://gist.github.com/N3mes1s/f76b4a606308937b0806a5256bc1f918)
- [CVE](http://www.openwall.com/lists/oss-security/2025/10/22/1)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.66%
- **EPSS Percentile:** 49.7

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-11._