What is CVE-2025-13878?

CVE-2025-13878 is a high-severity vulnerability in Isc Bind 9, classified under Reachable Assertion. CVSS score: 7.5/10. Published 2026-01-21.

How severe is CVE-2025-13878?

High severity. CVSS v3 base score is 7.5 out of 10.

Vulnerability in Isc Bind 9

CVE-2025-13878

Malformed BRID/HHIT records can cause `named` to terminate unexpectedly. This issue affects BIND 9 versions 9.18.40 through 9.18.43, 9.20.13 through 9.20.17, 9.21.12 through 9.21.16, 9.18.40-S1 through 9.18.43-S1, and 9.20.13-S1 through 9…

EPSS: 0.000 (15.0th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Affected products

Isc Bind 9 — versions 9.18.40, 9.20.13, 9.21.12

Weakness classification (CWE)

CWE-617 — Reachable Assertion

References

CVE-2025-13878 (vendor-advisory)
downloads.isc.org/isc/bind9/9.18.44 (patch)
downloads.isc.org/isc/bind9/9.20.18 (patch)
downloads.isc.org/isc/bind9/9.21.17 (patch)

Frequently asked questions

What is CVE-2025-13878?: CVE-2025-13878 is a high-severity vulnerability in Isc Bind 9, classified under Reachable Assertion. CVSS score: 7.5/10. Published 2026-01-21.
How severe is CVE-2025-13878?: High severity. CVSS v3 base score is 7.5 out of 10.