What is CVE-2026-10723?

CVE-2026-10723 is a medium-severity vulnerability in Isc Bind 9, classified under Improper Verification of Cryptographic Signature. CVSS score: 6.8/10. Published 2026-07-22.

How severe is CVE-2026-10723?

Medium severity. CVSS v3 base score is 6.8 out of 10.

Vulnerability in Isc Bind 9

CVE-2026-10723

BIND may accept incorrect child-zone NSEC3 records as valid, which could allow an attacker to forge authenticated NXDOMAIN responses. This issue affects BIND 9 versions 9.18.0 through 9.18.50, 9.20.0 through 9.20.24, 9.21.0 through 9.21.23…

CVSS v3 metric

CVSS v3 base score 6.8 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:H/A:N.

Affected products

Isc Bind 9 — versions 9.18.0, 9.20.0, 9.21.0

Weakness classification (CWE)

CWE-347 — Improper Verification of Cryptographic Signature

References

security-officer@isc.org (vendor-advisory)
security-officer@isc.org (patch)
security-officer@isc.org (patch)

Frequently asked questions

What is CVE-2026-10723?: CVE-2026-10723 is a medium-severity vulnerability in Isc Bind 9, classified under Improper Verification of Cryptographic Signature. CVSS score: 6.8/10. Published 2026-07-22.
How severe is CVE-2026-10723?: Medium severity. CVSS v3 base score is 6.8 out of 10.