CVE-2026-58275

Microsoft · Azure DNS

A missing authorization vulnerability in Microsoft Azure DNS allows an unauthenticated, remote attacker to escalate privileges over a network.

Executive summary

A critical authorization flaw in Microsoft Azure DNS allows unauthenticated attackers to elevate privileges, posing a significant risk to network integrity.

Vulnerability

This is a missing authorization vulnerability (CWE-862). It allows an unauthenticated attacker to bypass security controls and perform unauthorized actions, leading to privilege escalation.

Business impact

With a CVSS score of 10.0, this vulnerability represents the highest level of severity. Successful exploitation could allow an attacker to gain unauthorized administrative control over DNS configurations, potentially leading to widespread traffic redirection, man-in-the-middle attacks, or complete service disruption.

Remediation

Immediate Action: Review the Microsoft Security Response Center (MSRC) update guide at the provided reference link and apply all recommended updates or configuration changes immediately.

Proactive Monitoring: Monitor Azure DNS activity logs for unauthorized configuration changes or anomalous traffic patterns that may indicate exploitation attempts.

Compensating Controls: Ensure that strict network access control lists and identity-based access policies are enforced for all management interfaces to limit the exposure of the DNS infrastructure.

Exploitation status

Public Exploit Available: No

Analyst recommendation

Given the critical severity of this vulnerability and the potential for complete compromise of DNS services, organizations must prioritize the review of the Microsoft security advisory. Apply all necessary patches or security configurations immediately to prevent potential privilege escalation.