cloud files driver

About this tag
The cloud files driver tag covers discussions about the Windows Cloud Files Mini Filter Driver (cldflt.sys), a kernel-mode component that enables on-demand cloud file functionality for services like OneDrive and SharePoint. Content focuses on multiple elevation-of-privilege vulnerabilities discovered in this driver, including CVE-2020-17103, CVE-2024-38215, CVE-2025-62221, CVE-2025-62457, CVE-2026-27926, and CVE-2026-34337. These flaws allow local authenticated users to escalate privileges, often through memory corruption issues like use-after-free or out-of-bounds read. Threads emphasize the importance of patching promptly, as some vulnerabilities have been added to CISA's Known Exploited Vulnerabilities catalog or have public proof-of-concept exploits. The tag is relevant for IT administrators and security professionals managing Windows systems with cloud file integration.

  1. MiniPlasma PoC Questions KB5089549 Fix for CVE-2020-17103 on Win11

    Microsoft’s May 12, 2026 Windows 11 security update KB5089549 is now under scrutiny after a public proof-of-concept called MiniPlasma claimed to revive CVE-2020-17103, a Windows Cloud Files Mini Filter Driver privilege-escalation flaw first addressed in December 2020. The uncomfortable part is...
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    • cloud files driver local privilege escalation patch tuesday windows 11 security
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    • Forum: Windows News

  2. CVE-2026-34337: Windows Cloud Files Mini Filter EoP—Why Patch Fast

    Microsoft has listed CVE-2026-34337 as a Windows Cloud Files Mini Filter Driver elevation-of-privilege vulnerability in the Security Update Guide, a local Windows flaw whose practical risk depends less on remote reachability than on how quickly attackers can turn sparse public details into...
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    • cloud files driver patch tuesday privilege escalation windows security
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    • Forum: Security Alerts

  3. CVE-2026-27926 Cloud Files Mini Filter Driver EoP: Why Patch Now

    Microsoft’s Security Update Guide entry for CVE-2026-27926 identifies it as a Windows Cloud Files Mini Filter Driver Elevation of Privilege Vulnerability, and the metadata you quoted is important because it speaks directly to Microsoft’s confidence in the existence of the flaw and the...
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    • cloud files driver cve 2026 27926 privilege escalation windows security
    • Replies: 0
    • Forum: Security Alerts

  4. December 2025 Patch Tuesday: Critical PowerShell, Cloud Files, Copilot Fixes

    Microsoft pushed a high-priority December 9, 2025 Patch Tuesday that closes several dangerous holes — including a PowerShell command-injection flaw that now forces a confirmation prompt, a Windows Cloud Files Mini Filter Driver bug actively used for local privilege escalation, and a...
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    • cloud files driver copilot jetbrains patch powershell security
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    • Forum: Windows News

  5. CISA KEV Adds WinRAR Path Traversal and Windows Cloud Files UAF — Remediation Guide

    CISA’s decision to add two recently disclosed flaws — a WinRAR path‑traversal bug (CVE-2025-6218) and a Windows Cloud Files mini‑filter use‑after‑free (CVE-2025-62221) — to the Known Exploited Vulnerabilities (KEV) Catalog crystallizes a simple reality for defenders: time-to-fix is shrinking and...
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    • cloud files driver kev remediation privilege escalation winrar vulnerabilities
    • Replies: 0
    • Forum: Security Alerts

  6. CVE-2025-62457: Patch Cloud Files Mini Filter Driver for LPE (OOB Read)

    An out‑of‑bounds read in the Windows Cloud Files Mini Filter Driver (cldflt.sys) can be abused to escalate privileges locally, and administrators should treat the resulting CVE — reported under CVE-2025-62457 by Microsoft — as a high‑priority patching item for any systems that expose or use...
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    • cloud files driver patch management privilege escalation windows security
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    • Forum: Security Alerts

  7. Understanding CVE-2024-38215: Elevation of Privilege in Windows Cloud Files Driver

    In the realm of cybersecurity, vulnerabilities can pose significant threats not only to individual users but also to entire organizational infrastructures. One such vulnerability that has recently come to light is CVE-2024-38215, which affects the Windows Cloud Files Mini Filter Driver. This...
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    • cloud files driver cve-2024-38215 cybersecurity elevation of privilege security best practices windows vulnerabilities
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    • Forum: Security Alerts