""While there is no confirmed public PoC for CVE-2025-62221, past research and PoCs for related Cloud Files mini-filter issues suggest attackers already understand the underlying techniques," said Mike Walters, co-founder and CEO of patch management specialist Action1. "The real impact of this vulnerability emerges when attackers chain it with other weaknesses. After gaining low-privileged access through phishing, a browser exploit, or an application RCE, they can use CVE-2025-62221 to escalate to SYSTEM and take full control of the host.""
"Microsoft has addressed a little shy of 60 newly-designated common vulnerabilities and exposures (CVEs) in the final Patch Tuesday update of a challenging year for defenders, bringing the total volume of flaws fixed this year to over 1,100. Out of this month's flaws, three are rated as critical in their severity, one is known to be actively exploited in the wild, and two more are known to have public proofs of concept available, but are not yet being exploited."
Microsoft fixed nearly 60 newly-designated CVEs in the final Patch Tuesday update, bringing the year's total to over 1,100 patched flaws. Three of the monthly vulnerabilities are rated critical, one is confirmed exploited in the wild, and two have public proofs of concept. The exploited issue, CVE-2025-62221, is a use-after-free in the Windows Cloud Files Mini Filter Driver that can enable escalation to SYSTEM. Two public RCEs affect PowerShell (CVE-2025-54100) and GitHub Copilot for JetBrains (CVE-2205-64671). Security experts warned that the Cloud Files flaw may rapidly enter attacker chains and threaten low-privilege or shared endpoints.
Read at ComputerWeekly.com
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