cve-2025-54101

CVE-2025-54101 is a use-after-free vulnerability in the Windows SMBv3 Client that can be triggered over a network, potentially allowing an attacker to execute arbitrary code in the context of the affected process. This client-side remote code execution (RCE) flaw was addressed in Microsoft's September Patch Tuesday 2025 update, which also included fixes for dozens of other CVEs across Windows core components, Office, graphics, SMB/SMBv3, NTLM, and virtualization subsystems. Cisco Talos published Snort rules to detect exploit attempts against this and other high-priority elevation-of-privilege and memory-safety issues. Administrators and endpoint owners should prioritize patching affected systems and apply layered mitigations until updates are confirmed and deployed.