CVE-2025-40776

HIGHNVD 8.68.6—
EchelonGraph scoreMEDIUM confidence

Score 8.6 from GitHub Security Advisory (severity: HIGH) published 2025-07-16. NVD baseline CVSS 8.6; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
8.6
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 8.6Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

A named caching resolver that is configured to send ECS (EDNS Client Subnet) options may be vulnerable to a cache-poisoning attack. This issue affects BIND 9 versions 9.11.3-S1 through 9.16.50-S1, 9.18.11-S1 through 9.18.37-S1, and 9.20.9-S1 through 9.20.10-S1.

CVSS v3
8.6
EG Score
8.6(medium)
EPSS
9.5%
KEV
Not listed

Published

July 16, 2025

Last Modified

April 15, 2026

References (1)

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 14× in last 7d / 50× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 111 total refreshes for this CVE.

  1. 2026-07-16 17:02 UTCEPSS rescore
  2. 2026-07-15 16:57 UTCEPSS rescore
  3. 2026-07-15 16:57 UTCEPSS rescore
  4. 2026-07-15 01:59 UTCEPSS rescore
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  10. 2026-07-11 08:27 UTCEPSS rescore
  11. 2026-07-11 08:27 UTCEPSS rescore
  12. 2026-07-10 09:22 UTCOSV refresh
  13. 2026-07-09 19:09 UTCEPSS rescore
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  15. 2026-07-07 13:45 UTCEPSS rescore
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  1. 2026-06-29 14:06 UTCEPSS rescore
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  16. 2026-06-21 19:43 UTCOSV refresh
  17. 2026-06-21 14:56 UTCEPSS rescore
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  19. 2026-06-21 01:59 UTCEPSS rescore
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  21. 2026-06-19 19:25 UTCEPSS rescore
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  23. 2026-06-18 17:52 UTCEPSS rescore
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  28. 2026-06-14 23:17 UTCEPSS rescore
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  39. 2026-06-05 22:46 UTCEPSS rescore
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  41. 2026-06-05 06:10 UTCEPSS rescore
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  43. 2026-06-04 13:12 UTCEPSS rescore
  44. 2026-06-04 13:12 UTCEPSS rescore
  45. 2026-06-02 23:40 UTCOSV refresh
  46. 2026-06-02 20:12 UTCEPSS rescore
  47. 2026-06-01 13:51 UTCEPSS rescore
  48. 2026-06-01 13:51 UTCEPSS rescore
  49. 2026-05-31 22:30 UTCEPSS rescore
  50. 2026-05-31 22:30 UTCEPSS rescore
  51. 2026-05-31 00:16 UTCEPSS rescore
  52. 2026-05-29 13:44 UTCEPSS rescore
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  57. 2026-05-27 13:40 UTCEPSS rescore
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  65. 2026-05-26 07:18 UTCEPSS rescore
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  68. 2026-05-26 07:18 UTCEPSS rescore
  69. 2026-05-24 16:57 UTCEPSS rescore
  70. 2026-05-22 21:16 UTCEPSS rescore
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  72. 2026-05-22 21:16 UTCEPSS rescore
  73. 2026-05-22 21:16 UTCEPSS rescore
  74. 2026-05-21 11:09 UTCEG score recompute
  75. 2026-05-21 11:08 UTCGHSA enrichment

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2025-40776?
CVE-2025-40776 is a high vulnerability published on July 16, 2025. A named caching resolver that is configured to send ECS (EDNS Client Subnet) options may be vulnerable to a cache-poisoning attack. This issue affects BIND 9 versions 9.11.3-S1 through 9.16.50-S1, 9.18.11-S1 through 9.18.37-S1, and 9.20.9-S1 through 9.20.10-S1.
When was CVE-2025-40776 disclosed?
CVE-2025-40776 was first published in the National Vulnerability Database on July 16, 2025, with the most recent update on April 15, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2025-40776 actively exploited?
CVE-2025-40776 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 9.5% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2025-40776?
CVE-2025-40776 has a CVSS v3 base score of 8.6 (NVD).
How do I remediate CVE-2025-40776?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2025-40776, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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