Search/CVE-2025-40776
● CVE — High

CVE-2025-40776

DiscoveredJul 16, 2025UpdatedApr 15, 2026

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.

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CVSS v3.1
8.6 HIGH
EPSS
0.23%
probability of exploitation in 30 days
CISA KEV
Not listed
no confirmed exploitation reported
News coverage
0
sources referencing this CVE
Related IOCs
0
seen in the same coverage
EPSS Trend
Aug 16, 2026 → Oct 29, 2026
▲ 0.03pp
0.20% → 0.23% over 5 tracked changes
CVSS v3.1 Detail
Attack VectorNETWORK
Attack ComplexityLOW
Privileges RequiredNONE
User InteractionNONE
ScopeCHANGED
ConfidentialityNONE
IntegrityHIGH
AvailabilityNONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N
Connections
1 relationships
Timeline
disclosure → media coverage
Jul 16, 2025
Disclosure — published as a CVE record. · last revised by NVD Apr 15, 2026