CVE-2025-59285: 
Azure Monitor agent vulnerability analysis and mitigation

CVE-2025-59285 is a deserialization vulnerability in the Azure Monitor Agent that was disclosed in Microsoft's October 2025 Patch Tuesday update. The vulnerability allows an authorized attacker to elevate privileges locally through untrusted data deserialization. This security flaw affects Azure Monitor Agent deployments and was rated as Important severity (Cybersecurity News, GBHackers).

The vulnerability is classified as an Elevation of Privilege issue caused by deserialization of untrusted data in the Azure Monitor Agent. The flaw requires local access and authorization for exploitation. While specific CVSS scores were not published, Microsoft categorized it as Important rather than Critical severity, suggesting a moderate risk level (Lansweeper).

If successfully exploited, the vulnerability allows an authorized attacker to elevate their privileges locally on affected systems. This could potentially enable attackers to gain increased system access and permissions beyond their intended authorization level (Cybersecurity News).

Microsoft has released a patch for this vulnerability as part of the October 2025 Patch Tuesday updates. Organizations are advised to apply the security update through Windows Update or their standard patch management processes (Cybersecurity News).