VulnerabilityAnalyzed

CVE-2026-3592

BIND resolvers are vulnerable to an amplified resource consumption/exhaustion attack.

MEDIUM 5.3EPSS 0.41%

Does this matter?

Lower severity and a low EPSS score (0.41%). Track it; it rarely justifies an emergency change on its own.

Description

BIND resolvers are vulnerable to an amplified resource consumption/exhaustion attack. If a victim resolver makes a query to a specially crafted zone, the resolver will consume disproportionate resources. This issue affects BIND 9 versions 9.11.0 through 9.16.50, 9.18.0 through 9.18.48, 9.20.0 through 9.20.22, 9.21.0 through 9.21.21, 9.11.3-S1 through 9.16.50-S1, 9.18.11-S1 through 9.18.48-S1, and 9.20.9-S1 through 9.20.22-S1.

CVSS 3.1: 5.3 MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
EPSS: 0.41% probability · 34th percentile
CISA KEV: Not listed
Weakness: CWE-408
Affected: isc/bind
Source: security-officer@isc.org

References

https://downloads.isc.org/isc/bind9/9.18.49Patch
https://downloads.isc.org/isc/bind9/9.20.23Patch
https://downloads.isc.org/isc/bind9/9.21.22Patch
https://kb.isc.org/docs/cve-2026-3592Vendor Advisory

Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.