![isc bind]()
CVE-2026-76163 is a vulnerability in ISC BIND
Published on September 16, 2026
named aborts on a TKEY query when the user configuration has no global options statement
If BIND is loaded with a "`named.conf`" file that contains no global "`options`" block, an attacker can send a query of QTYPE TKEY which may cause an assertion failure and subsequent unexpected program exit.
This issue affects BIND 9 versions 9.20.0 through 9.20.27, 9.21.0 through 9.21.25, and 9.20.9-S1 through 9.20.27-S1.
Vulnerability Analysis
CVE-2026-76163 can be exploited with network access, and does not require authorization privileges or user interaction. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality and integrity, and a high impact on availability.
Weakness Type
What is an assertion failure Vulnerability?
The product contains an assert() or similar statement that can be triggered by an attacker, which leads to an application exit or other behavior that is more severe than necessary.
CVE-2026-76163 has been classified to as an assertion failure vulnerability or weakness.
Products Associated with CVE-2026-76163
Want to know whenever a new CVE is published for ISC BIND? stack.watch will email you.
Affected Versions
ISC BIND 9:- Version 9.20.0, <= 9.20.27 is affected.
- Version 9.21.0, <= 9.21.25 is affected.
- Version 9.20.9-S1, <= 9.20.27-S1 is affected.