CVE-2025-21188

Summary

CVE-2025-21188 is an elevation of privilege vulnerability affecting Azure Network Watcher VM Extension. Malicious actors could exploit this flaw to gain elevated access to vulnerable Azure virtual machines. The vulnerability arises due to insufficient access control checks in the extension's process. Successful exploitation could allow attackers to perform unauthorized actions, including installing malware and accessing sensitive data. Microsoft has released patches to address this issue, and it is recommended that all affected Azure instances be updated promptly to mitigate risk.

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