CVE-2025-59282: RCE in Windows IIS Inbox COM Objects

An attacker who successfully exploits CVE-2025-59282 can achieve local code execution on a vulnerable Windows system. This means they can run arbitrary commands with the privileges of the affected user account, potentially escalating privileges to SYSTEM level. The impact is significant, as an attacker could install malware, steal sensitive data, modify system configurations, or disrupt services. Given that IIS is often used to host web applications and services, a successful exploit could also lead to the compromise of those applications and the data they handle. The blast radius extends to any data accessible by the compromised user account, and potentially the entire network if the attacker can leverage the compromised system for lateral movement.

1. Reserved2025-09-11
2. Published2025-10-14
3. Modified2026-02-26
4. EPSS updated2026-03-23

The primary mitigation for CVE-2025-59282 is to upgrade to Windows version 10.0.26200.6899 or later, which includes the fix for this race condition. If immediate patching is not feasible, consider implementing temporary workarounds. While a direct WAF rule is unlikely to prevent this local RCE, restricting access to sensitive COM objects via network segmentation can reduce the attack surface. Regularly review IIS configuration and permissions to ensure least privilege principles are followed. Monitor system logs for suspicious activity related to IIS processes and COM object usage. After upgrading, confirm the vulnerability is resolved by attempting to reproduce the conditions that trigger the race condition in a test environment.