Security readout for executives and security teams
Plain-English summary
CVE-2025-62221 is a Microsoft Windows privilege-escalation flaw in the Cloud Files Mini Filter Driver. An attacker who already has local, low-privileged access could potentially gain higher system privileges. This is not a remote entry point, but it can materially worsen a workstation or server compromise.
Executive priority
Treat as a high-priority patching item, especially for servers and administrator workstations. It does not provide initial remote access, but it can help an intruder turn limited access into full control.
Technical view
Microsoft describes a use-after-free vulnerability (CWE-416) in the Windows Cloud Files Mini Filter Driver. CVSS 3.1 is 7.8: local attack vector, low complexity, low privileges required, no user interaction, and high confidentiality, integrity, and availability impact. Microsoft lists official remediation as available.
Likely exposure
Exposure is likely on affected Windows 10, Windows 11, and Windows Server versions listed by Microsoft, including Server Core variants. Systems are mainly at risk after an attacker obtains local authenticated access through another route.
Exploitation context
The source bundle does not show active exploitation. The CVSS vector indicates local, authenticated exploitation with no user interaction. CISA KEV is provided as a reference, but the bundle marks KEV status as false.
Researcher notes
Evidence is limited to Microsoft/CVE metadata and CISA KEV reference status. No public exploit details are included in the provided bundle. The vulnerability class is use-after-free in a Windows file system filter driver, suggesting kernel-level privilege impact if triggered locally.
Mitigation direction
- Apply Microsoft’s official update for CVE-2025-62221 from the MSRC advisory.
- Prioritize internet-facing servers, shared workstations, and systems used by privileged administrators.
- If patching is delayed, monitor Microsoft guidance for supported mitigations or workarounds.
- Reduce local user privileges where possible until updates are deployed.
Validation and detection
- Inventory Windows endpoints and servers against Microsoft’s affected version list.
- Confirm the relevant Microsoft security update is installed on each affected system.
- Check vulnerability management tools for CVE-2025-62221 detection coverage.
- Review CISA KEV periodically for any change in exploitation status.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-416: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupPrivilege behavior lookup
The CVE wording references privilege impact, so privilege escalation and authorization behavior review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2025-62221 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- High
- CVSS
- 7.8 (3.1)
- Known Exploited
- Yes
- Published
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CISA KEV status
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C1.85.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
7.8HighVector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Source materials
- CVE List V5 sourceCVE List V5
- Windows Cloud Files Mini Filter Driver Elevation of Privilege VulnerabilityCVE reference · vendor-advisory, patch
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-62221CVE reference · government-resource
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Use After Free
Use After Free represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.