CVE-2026-58613Patch(microsoft / windows_10_1809)

CVE-2026-58613 - Microsoft Windows Cloud Files Mini Filter Driver CldiStreamCompleteRequest use-after-free vulnerability Details : https://talosintelligence.com/vulnerability_reports/TALOS-2026-2426

🚨 [WINDOWS SECURITY] — CISCO TALOS DETAILS A WINDOWS KERNEL FLAW THAT CAN HELP TURN LOCAL ACCESS INTO HIGHER PRIVILEGES. CVE-2026-58613 affects Windows’ Cloud Files Mini Filter Driver. CyberSignal Priority: 🟠 HIGH THREAD 🧵👇 1/8 CVE-2026-58613 is a: USE-AFTER-FREE inside: cldflt.sys That’s the Windows Cloud Files Mini Filter Driver — a privileged component involved in integrating cloud-backed files with the local filesystem. 2/8 Think of cloud Files On-Demand: Placeholder file ↓ Application requests content ↓ Windows communicates with cloud provider ↓ Content gets hydrated locally The vulnerable driver sits inside this privileged filesystem path. 3/8 Cisco Talos says a specially crafted sequence of Cloud Filter API calls can trigger incorrect object handling. Memory that has already been freed can then be referenced again. That creates: KERNEL MEMORY CORRUPTION. 4/8 Potential attack chain: Initial foothold ↓ Low-privileged execution ↓ Malicious Cloud Filter API calls ↓ Use-after-free in cldflt.sys ↓ Kernel memory corruption ↓ Privilege escalation ↓ Higher control of the Windows host 5/8 Important: This is NOT: INTERNET ↓ INSTANT SYSTEM COMPROMISE. The attacker already needs local code execution. But real intrusions often use exactly this progression: Foothold → privilege escalation → SYSTEM → credential theft → lateral movement. 6/8 Affected Windows families include versions across: → Windows 10 → Windows 11 → Windows Server 2019 → Windows Server 2022 → Windows Server 2025 Talos scores the issue: CVSS 8.8 7/8 ⚠️ Important caveat: This CVE was NOT first disclosed today. Microsoft patched/disclosed it earlier. What is NEW on September 10: Cisco Talos published deeper technical analysis. Also: ❌ No Talos-confirmed active exploitation ❌ Not remotely exploitable alone 8/8 🛡️ Defender action: → Confirm Windows updates → Restrict unauthorized binaries → Monitor unexpected privilege transitions → Investigate unusual SYSTEM processes after user compromise CyberSignal Insight: Initial access gets attackers inside. Kernel escalation determines HOW MUCH becomes theirs.

🚨 HIGH Severity: CVE-2026-58613 (CVSS 7.8) Use-after-free in Windows Cloud Files Mini Filter Driver enables local privilege escalation by authenticated attackers. Patch immediately. #CVE #Vulnerability #PatchNow #ThreatIntel #DFIR https://t.co/1Ulk20hJBn

🪟 CVE-2026-58613 turns a small Windows foothold into system-level power via cldflt.sys. July’s Patch Tuesday isn’t optional—unless “local attacker” is your favorite new admin. https://windowsforum.com/threads/cve-2026-58613-install-july-updates-to-fix-windows-privilege-escalation.438858/?utm_source=x&utm_medium=social&utm_campaign=news_node84 #WindowsSecurity #CloudFilesDriver #PatchTuesday #Cve202658613 https://t.co/ojUVDo78EN