What is CVE-2026-3592?

CVE-2026-3592 is a medium-severity vulnerability in Isc Bind, classified under CWE-408. CVSS score: 5.3/10. Published 2026-05-20.

How severe is CVE-2026-3592?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Vulnerability in Isc Bind

CVE-2026-3592

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.

Published 2026-05-20 · last modified 2026-07-24.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L.

EPSS exploit prediction

EPSS: 0.004 (33.7th percentile), scored 2026-10-24.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 34th percentile — 33.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.006 · newest: 0.004 · change: -0.002

Affected products

Isc Bind
Isc Bind 9 — versions 9.11.0, 9.18.0, 9.20.0

Weakness classification (CWE)

CWE-408

References

downloads.isc.org/isc/bind9/9.18.49 (Patch, patch)
downloads.isc.org/isc/bind9/9.20.23 (Patch, patch)
downloads.isc.org/isc/bind9/9.21.22 (Patch, patch)
kb.isc.org/docs/cve-2026-3592 (vendor-advisory, Vendor Advisory)

Frequently asked questions

What is CVE-2026-3592?: CVE-2026-3592 is a medium-severity vulnerability in Isc Bind, classified under CWE-408. CVSS score: 5.3/10. Published 2026-05-20.
How severe is CVE-2026-3592?: Medium severity. CVSS v3 base score is 5.3 out of 10.