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-S1 through 9.18.39-S1, and 9.20.9-S1 through 9.20.13-S1.

Published · last modified .

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.

EPSS exploit prediction

EPSS: 0.107 (95.8th percentile), scored .

Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 96th percentile — 95.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2025-8677: held from 0.112 to 0.107.

EPSS over last 30 days · oldest: 0.112 · newest: 0.107 · change: -0.005

Affected products

Weakness classification (CWE)

References

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.