CVE Alert: CVE-2025-59504 – Microsoft – Azure Monitor

Risk verdict

High risk of local code execution on endpoints with Azure Monitor Agent; no evidence of remote exploitation in the data, but urgency increases if KEV or SSVC indicates active exploitation.

Why this matters

Exploitation could allow an attacker to run arbitrary code with high availability impact, potentially disrupting monitoring and alerting. In enterprise environments, this could enable persistence, data exposure through misconfigured monitors, or sabotage of telemetry to evade detection.

Most likely attack path

Attacker needs local access to the host (AV: Local, AC: Low). No privileges required (PR: None), no user interaction (UI: None), giving a straightforward local-breach to trigger the RCE. Scope is unchanged, so impact is primarily the compromised host rather than broad cross-resource movement unless combined with other footholds.

Who is most exposed

Any organisation deploying Azure Monitor Agent across servers or workstations is affected, especially in hybrid/Azure-centric estates. Common deployments include endpoint telemetry for cloud and on-prem workloads, often with broad host visibility.

Detection ideas

• Unusual Azure Monitor Agent process activity or memory usage spikes.
• Unexpected code execution events or crash dumps tied to the agent.
• New or unsigned modules loaded within the agent process.
• Increased privilege escalation attempts originating from the agent’s host, or process injection signals.
• Suspicious memory corruption symptoms in endpoint security telemetry.

Mitigation and prioritisation

• Update Azure Monitor Agent to the latest available release (>= v1.37.1 or vendor-supplied patch).
• Apply strict least-privilege controls and restrict local code execution where feasible; isolate agent containers/services.
• Enable enhanced EDR alerts for process creation, memory anomalies, and parent-child process relationships involving the agent.
• Validate endpoint baselines; monitor for anomalous memory/CPU usage and crash patterns on affected hosts.
• If KEV true or EPSS ≥ 0.5, treat as priority 1.