Windows Performance Monitor Integer Underflow RCE

Remote code execution in Microsoft Windows Performance Monitor (PerfMon) allows unauthenticated network-based attackers to execute arbitrary code by triggering an integer underflow condition. The flaw carries a CVSS 3.1 score of 8.1 driven by high impact across confidentiality, integrity, and availability, though high attack complexity (AC:H) tempers exploitability. No public exploit has been identified at time of analysis and the vulnerability is not listed in CISA KEV, but Microsoft has released a patch via MSRC guidance.

Remote code execution in Windows Performance Monitor enables unauthenticated network attackers to execute arbitrary code by triggering an integer underflow condition in the component's data handling logic. The flaw carries a CVSS score of 8.1 with high attack complexity, and while no public exploit identified at time of analysis, the SSVC assessment rates technical impact as total. Microsoft has released a patch via MSRC, and the issue is also tracked in VulDB entry 369628.