Is CVE-2025-40778 actively exploited?

No active exploitation of CVE-2025-40778 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2025-40778 be exploited remotely?

Yes. CVE-2025-40778 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2025-40778?

CVE-2025-40778 has a CVSS score of 8.6 (HIGH).

HOME VULNERABILITIESCVE-2025-40778

HIGH

CVE-2025-40778

CWE-349Published: October 22, 2025· Updated: Jun 17, 2026

8.6

CVSS v3.1

Official 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.

NVD Source

Technical Analysis

CVE-2025-40778 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in full integrity compromise (data manipulation), with a CVSS base score of 8.6.

The vulnerability has a "Changed" scope, meaning successful exploitation can impact components beyond the vulnerable component itself — such as the host operating system or adjacent services.