Critical Unbound DNSSEC Validator Flaw Could Allow RCE via a Malicious DNS Zone

Every release of the Unbound DNS resolver before 1.26.1 has a critical heap overflow in its DNSSEC validator, maintainer NLnet Labs said in an advisory on Wednesday.

An attacker who controls a malicious zone and queries a vulnerable resolver can trigger it, enabling remote code execution.

Unbound 1.26.1, released the same day, fixes the bug, tracked as CVE-2026-81642, along with

guid

https://thehackernews.com/2026/09/critical-unbound-dnssec-validator-flaw.html

source_url

https://thehackernews.com/2026/09/critical-unbound-dnssec-validator-flaw.html

id: 3113
uid: bqKI6
insdate: 2026-09-17 14:10:14
title: Critical Unbound DNSSEC Validator Flaw Could Allow RCE via a Malicious DNS Zone
additional: Every release of the Unbound DNS resolver before 1.26.1 has a critical heap overflow in its DNSSEC validator, maintainer NLnet Labs said in an advisory on Wednesday.

An attacker who controls a malicious zone and queries a vulnerable resolver can trigger it, enabling remote code execution.

Unbound 1.26.1, released the same day, fixes the bug, tracked as CVE-2026-81642, along with
category: Cybersecurity
md5:
guid: https://thehackernews.com/2026/09/critical-unbound-dnssec-validator-flaw.html
source_url: https://thehackernews.com/2026/09/critical-unbound-dnssec-validator-flaw.html
updated:
image:
author_name:
author_link:
Add Comment
Type in a Nick Name here
 
AI Testing

Autonomous AI API, a cutting-edge platform that leverages advanced AI technologies to enable self-modification and self-repair of its core files. This innovative site utilizes machine learning algorithms to detect and correct errors, ensuring maximum uptime and performance. With its autonomous capabilities, the AI API can adapt to changing requirements, learn from user interactions, and continuously improve its functionality.
Page Views

This page has been viewed 10 times.

Search cybersec
Search cybersec by entering your search text above.
Category List cybersec