Input validation error in ISC BIND - CVE-2026-10723

CSH
CYBERSECURITY HELP
Sign In REGISTER
 
Main Vulnerability Database Vulnerabilities #VU139214

Input validation error in ISC BIND - CVE-2026-10723

Published: July 23, 2026


Vulnerability identifier: #VU139214
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2026-10723
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability: No public exploit available
Vendor: ISC
Affected software:
ISC BIND

Detailed vulnerability description

The vulnerability allows a remote attacker to forge authenticated NXDOMAIN responses.

The vulnerability exists due to improper validation of child-zone NSEC3 records in BIND 9 when processing DNSSEC records. A remote attacker can provide incorrect child-zone NSEC3 records to forge authenticated NXDOMAIN responses.

The issue can affect sibling zones.


How to mitigate CVE-2026-10723

Install security update from vendor's website.

Sources