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Azure Monitor Agent Metrics Extension Elevation of Privilege Vulnerability
CVE-2026-42830 is an elevation of privilege vulnerability in the Azure Monitor Agent Metrics Extension caused by an untrusted search path condition. According to the provided content, the issue is tied to OpenSSL configuration auto-loading behavior used by extension modules such as MetricsExtension. If a malicious DLL is placed in a location referenced by that configuration, the DLL may be implicitly loaded, resulting in arbitrary code execution in a higher-privileged context. Microsoft classifies the flaw as CWE-426 and rates it Important with CVSS 3.1 6.5 (AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:N).
What it means and what to do now: patch path, interim mitigations, and the assume-compromise checklist.
What an attacker gets, and what they’ve been doing with it.
Successful exploitation allows a local authorized attacker with low privileges to elevate privileges and achieve arbitrary code execution in the context of the affected component. The primary security impact is high integrity impact through unauthorized code execution and modification of system behavior or trusted processes. Based on the provided CVSS and Microsoft summary, the vulnerability does not inherently provide direct confidentiality impact or service disruption.
If you can’t patch tonight, do this now.
If immediate patching is not possible, reduce exposure by restricting local low-privilege access to affected hosts, monitoring for unexpected DLLs in locations referenced by the agent or its OpenSSL-related configuration, and tightening file-system permissions so unprivileged users cannot place or modify libraries in directories that may be searched or referenced during extension loading. Review and constrain configuration paths used by the Azure Monitor Agent Metrics Extension where feasible.
Patch, then assume compromise.
Apply Microsoft's official fix for CVE-2026-42830 to the affected Azure Monitor Agent Metrics Extension. Because the issue is associated with untrusted search path behavior and implicit DLL loading via OpenSSL configuration auto-loading, remediation should ensure the patched version is deployed across affected systems and that any vulnerable extension binaries or configurations are updated to the vendor-corrected release.
No public exploits tracked yet. Mallory keeps watching.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
3 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.