What is CVE-2025-8677?

CVE-2025-8677 is a high-severity vulnerability in Isc Bind 9, classified under Asymmetric Resource Consumption (Amplification). CVSS score: 7.5/10. Published 2025-10-22.

How severe is CVE-2025-8677?

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

Vulnerability in Isc Bind 9

CVE-2025-8677

Querying for records within a specially crafted zone containing certain malformed DNSKEY records can lead to CPU exhaustion. This issue affects BIND 9 versions 9.18.0 through 9.18.39, 9.20.0 through 9.20.13, 9.21.0 through 9.21.12, 9.18.11…

EPSS: 0.001 (21.9th 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 9.18.0, 9.20.0, 9.21.0

Weakness classification (CWE)

CWE-405 — Asymmetric Resource Consumption (Amplification)

References

CVE-2025-8677 (vendor-advisory)

Frequently asked questions

What is CVE-2025-8677?: CVE-2025-8677 is a high-severity vulnerability in Isc Bind 9, classified under Asymmetric Resource Consumption (Amplification). CVSS score: 7.5/10. Published 2025-10-22.
How severe is CVE-2025-8677?: High severity. CVSS v3 base score is 7.5 out of 10.