How severe is CVE-2025-8677?

CVE-2025-8677 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2025-8677 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 11% (95th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2025-8677?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2025-8677 have an EU (EUVD) identifier?

Yes. CVE-2025-8677 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-35583.

When was CVE-2025-8677 published?

CVE-2025-8677 was published on 2025-10-22 and last updated on 2026-06-17.

CVE-2025-8677

CVE-2025-8677 is a high-severity vulnerability with a CVSS 3.x base score of 7.5. Its EPSS exploit-prediction score of 11% places it in the 95th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-405.

Key facts

Severity: High (CVSS 3.x base score 7.5)
EPSS exploit prediction: 11% (95th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-35583
Weakness: CWE-405
Published: 2025-10-22
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is 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.
How severe is CVE-2025-8677?: CVE-2025-8677 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2025-8677 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 11% (95th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2025-8677?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2025-8677 have an EU (EUVD) identifier?: Yes. CVE-2025-8677 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-35583.
When was CVE-2025-8677 published?: CVE-2025-8677 was published on 2025-10-22 and last updated on 2026-06-17.

References

Other CWE-405 vulnerabilities

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