High

Remote Code Execution in Azure Monitor Agent

IdentifiersCVE-2025-62550CWE-787· Out-of-bounds Write

CVE-2025-62550 is a high-severity remote code execution vulnerability in Azure Monitor Agent. The issue is described as an out-of-bounds write, with associated weakness mappings including CWE-787 (Out-of-bounds Write) and CWE-131 (Incorrect Calculation of Buffer Size), indicating memory corruption caused by improper buffer sizing or bounds handling. According to the provided Microsoft/MSRC-derived context, exploitation allows an authorized attacker to execute code over a network. The available CVSS v3.1 vector is AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H, consistent with low-complexity network-reachable exploitation requiring low privileges and no user interaction. No specific vulnerable function or code path is identified in the provided content.

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ANALYST BRIEF

Impact, mitigation & remediation

What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.

Impact

What an attacker gets, and what they’ve been doing with it.

Successful exploitation can result in arbitrary code execution in the context of the Azure Monitor Agent, with high impact to confidentiality, integrity, and availability. The provided CVSS metrics indicate that an attacker could potentially read or access sensitive data handled by the agent, modify data or agent behavior, and disrupt service availability. Because this is a memory corruption flaw in a monitoring agent, compromise could also provide a foothold on affected systems, depending on the agent's runtime privileges and deployment context.

Mitigation

If you can’t patch tonight, do this now.

If immediate patching is not possible, reduce exposure by limiting network access to systems and interfaces through which Azure Monitor Agent can be reached, restricting authorization paths to trusted administrators and service principals only, and monitoring for anomalous activity involving the agent. Because exploitation requires authorization, enforcing least privilege, reviewing accounts permitted to interact with the agent, and segmenting management networks may reduce risk until patches are applied. No vendor-specific workaround is provided in the supplied content.

Remediation

Patch, then assume compromise.

Apply Microsoft's December 9, 2025 security update for Azure Monitor Agent referenced in the MSRC Update Guide entry for CVE-2025-62550. Organizations should deploy the vendor-provided patched version of Azure Monitor Agent across affected environments and validate successful update installation through normal patch management and asset verification processes. No more specific remediation details are available in the provided content.

PUBLIC EXPLOITS

Exploits

No public exploits tracked yet. Mallory keeps watching.

VALID 0 / 0 TOTALView more in app

No public exploit code observed for this vulnerability.

EXPOSURE SURFACE

Affected products & vendors

Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.

VendorProductType

Microsoft CorporationAzure Monitor Agentapplication

Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.

ACTIVITY FEED

Recent activity

8 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.

8 SOURCESView more in app

cvefeed high severityNews

Dec 9, 2025

CVE-2025-62550 - Azure Monitor Agent Remote Code Execution Vulnerability

A high-severity remote code execution vulnerability in Azure Monitor Agent caused by an out-of-bounds write / incorrect buffer size calculation, allowing an authorized attacker to execute code over the network.

cyberscoopNews

Dec 9, 2025

Microsoft’s last Patch Tuesday of 2025 addresses 57 defects, including one zero-day

A high-severity vulnerability in the Azure Monitor Agent with a CVSS score of 8.8.

learn microsoftNews

Dec 9, 2025

Microsoft December 2025 Security Updates / FYI - Microsoft Q&A

Specific Microsoft vulnerability affecting Azure Monitor Agent listed in the December 2025 Security Updates.

learn microsoftNews

Dec 9, 2025

Microsoft December 2025 Security Updates / FYI - Microsoft Q&A

A Microsoft December 2025 security update vulnerability affecting Azure Monitor Agent.

What this page doesn’t show

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Exposure mapping

Query your assets running an affected version, and investigate the blast radius.

Threat actor evidence

Every observed campaign linking this CVE to a named adversary.

Associated malware

Malware families riding this exploit, with evidence and IOCs.

Detection signatures

YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.

Vendor-by-vendor mapping

Cross-references every affected SKU, including bundled OEM variants.

Social activity4