CVE-2026-3591 — Vulnetix

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CVE-2026-3591 PUBLISHED

On March 25, 2026, ISC published security advisories to address vulnerabilities in the following products: ISC BIND 9 – versions 9.11.0 to 9.16.50 ISC BIND 9 – versions 9.18.0 to 9.18.46 ISC BIND 9 – versions 9.20.0 to 9.20.20 ISC BIND 9 – versions 9.21.0 to 9.21.19 BIND Supported Preview Edition – versions 9.11.3-S1 to 9.16.50-S1 BIND Supported Preview Edition – versions 9.18.11-S1 to 9.18.46-S1 BIND Supported Preview Edition – versions 9.20.9-S1 to 9.20.20-S1 The Cyber Centre encourages users and administrators to review the provided web links and apply the necessary updates.

EPSS 0.01% · 1.3th percentile

Risk Scores

EPSS Score

0.01%

1.3th percentile

Affected Products

Vendor	Product	Versions
BIND	BIND Supported Preview Edition – versions 9.11.3-S1 to 9.16.50-S1
ISC	ISC BIND 9 – versions 9.20.0 to 9.20.20
BIND	BIND Supported Preview Edition – versions 9.20.9-S1 to 9.20.20-S1
ISC	ISC BIND 9 – versions 9.21.0 to 9.21.19
BIND	BIND Supported Preview Edition – versions 9.18.11-S1 to 9.18.46-S1
ISC	ISC BIND 9 – versions 9.11.0 to 9.16.50
ISC	ISC BIND 9 – versions 9.18.0 to 9.18.46

Timeline

Mar 25, 2026 Coalition ESS Score
Mar 25, 2026 CVE Published
Mar 25, 2026 CVE Updated
Mar 25, 2026 PoC Published
Mar 25, 2026 PoC Published
Mar 25, 2026 PoC Published
Mar 25, 2026 PoC Published
Mar 25, 2026 PoC Published
Mar 25, 2026 PoC Published
Mar 25, 2026 PoC Published
Mar 26, 2026 PoC Published
Mar 26, 2026 PoC Published

References

https://cyber.gc.ca/en/alerts-advisories/isc-bind-security-advisory-av26-280 advisory
https://kb.isc.org/docs/cve-2026-1519 vendor
https://kb.isc.org/docs/cve-2026-3104 vendor
https://kb.isc.org/docs/cve-2026-3119 vendor
https://kb.isc.org/docs/cve-2026-3591 vendor
https://kb.isc.org/docs/aa-00913 vendor

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