CVE-2025-49721
published 2025-07-08CVE-2025-49721: Heap-based buffer overflow in Windows Fast FAT Driver allows an unauthorized attacker to elevate privileges locally.
PriorityP343high7.8CVSS 3.1
AVLACLPRNUIRSUCHIHAH
EPSS
0.48%
38.1th percentile
Heap-based buffer overflow in Windows Fast FAT Driver allows an unauthorized attacker to elevate privileges locally.
Affected
47 ranges· showing 25
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| microsoft | windows_10_1507 | < 10.0.10240.21073 | 10.0.10240.21073 |
| microsoft | windows_10_1607 | < 10.0.14393.8246 | 10.0.14393.8246 |
| microsoft | windows_10_1809 | < 10.0.17763.7558 | 10.0.17763.7558 |
| microsoft | windows_10_21h2 | < 10.0.19044.6093 | 10.0.19044.6093 |
| microsoft | windows_10_22h2 | < 10.0.19045.6093 | 10.0.19045.6093 |
| microsoft | windows_10_version_1507 | >= 10.0.10240.0 < 10.0.10240.21073 | 10.0.10240.21073 |
| microsoft | windows_10_version_1607 | >= 10.0.14393.0 < 10.0.14393.8246 | 10.0.14393.8246 |
| microsoft | windows_10_version_1809 | >= 10.0.17763.0 < 10.0.17763.7558 | 10.0.17763.7558 |
| microsoft | windows_10_version_21h2 | >= 10.0.19044.0 < 10.0.19044.6093 | 10.0.19044.6093 |
| microsoft | windows_10_version_22h2 | >= 10.0.19045.0 < 10.0.19045.6093 | 10.0.19045.6093 |
| microsoft | windows_11_22h2 | < 10.0.22621.5624 | 10.0.22621.5624 |
| microsoft | windows_11_23h2 | < 10.0.22631.5624 | 10.0.22631.5624 |
| microsoft | windows_11_24h2 | < 10.0.26100.4652 | 10.0.26100.4652 |
| microsoft | windows_11_version_22h2 | >= 10.0.22621.0 < 10.0.22621.5624 | 10.0.22621.5624 |
| microsoft | windows_11_version_22h3 | >= 10.0.22631.0 < 10.0.22631.5624 | 10.0.22631.5624 |
| microsoft | windows_11_version_23h2 | >= 10.0.22631.0 < 10.0.22631.5624 | 10.0.22631.5624 |
| microsoft | windows_11_version_24h2 | >= 10.0.26100.0 < 10.0.26100.4652 | 10.0.26100.4652 |
| microsoft | windows_server_2008 | — | — |
| microsoft | windows_server_2008_r2_service_pack_1 | >= 6.1.7601.0 < 6.1.7601.27820 | 6.1.7601.27820 |
| microsoft | windows_server_2008_service_pack_2 | >= 6.0.6003.0 < 6.0.6003.23418 | 6.0.6003.23418 |
| microsoft | windows_server_2012 | — | — |
| microsoft | windows_server_2012 | >= 6.2.9200.0 < 6.2.9200.25573 | 6.2.9200.25573 |
| microsoft | windows_server_2012_r2 | >= 6.3.9600.0 < 6.3.9600.22676 | 6.3.9600.22676 |
| microsoft | windows_server_2016 | < 10.0.14393.8246 | 10.0.14393.8246 |
| microsoft | windows_server_2016 | >= 10.0.14393.0 < 10.0.14393.8246 | 10.0.14393.8246 |
CVSS provenance
nvdv3.17.8HIGHCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
vendor_msrc7.8HIGH
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GHSA
GHSA-2qpf-4qw3-28fj: Heap-based buffer overflow in Windows Fast FAT Driver allows an unauthorized attacker to elevate privileges locally
ghsa_unreviewed·2025-07-08
CVE-2025-49721 [HIGH] CWE-122 GHSA-2qpf-4qw3-28fj: Heap-based buffer overflow in Windows Fast FAT Driver allows an unauthorized attacker to elevate privileges locally
Heap-based buffer overflow in Windows Fast FAT Driver allows an unauthorized attacker to elevate privileges locally.
Microsoft
Windows Fast FAT File System Driver Elevation of Privilege Vulnerability
vendor_msrc·2025-07-08·CVSS 7.8
CVE-2025-49721 [HIGH] CWE-122 Windows Fast FAT File System Driver Elevation of Privilege Vulnerability
Windows Fast FAT File System Driver Elevation of Privilege Vulnerability
Description: Heap-based buffer overflow in Windows Fast FAT Driver allows an unauthorized attacker to elevate privileges locally.
FAQ: According to the CVSS metric, the attack vector is local (AV:L) while user interaction is required (UI:R). What does that mean for this vulnerability?
An attacker can trick a local user on a vulnerable system into mounting a specially crafted VHD that would then trigger the vulnerability.
FAQ: What privileges could be gained by an attacker who successfully exploited this vulnerability?
An attacker who successfully exploited this vulnerability could gain SYSTEM privileges.
Windows Fast FAT Driver: Windows Fast FAT Driver
Microsoft: Microsoft
Customer Action Required: Yes
Impact:
No detection rules found.
No public exploits indexed.
Qualys
Microsoft and Adobe Patch Tuesday, July 2025 Security Update Review | Qualys
blogs_qualys·2025-07-08
Microsoft and Adobe Patch Tuesday, July 2025 Security Update Review | Qualys
#### Table of Contents
- Microsoft Patch Tuesday for July 2025
- Adobe Patches for July 2025
- Zero-day Vulnerability Patched in July Patch Tuesday Edition
- Critical Severity Vulnerabilities Patched in July Patch Tuesday Edition
- Other Microsoft Vulnerability Highlights
- Microsoft Release Summary
- Discover and Prioritize Vulnerabilities inVulnerability Management, Detection & Response (VMDR)
- Rapid Response withPatch Management (PM)
- EVALUATE Vendor-Suggested Mitigation with Policy Audit
- Microsoft July 2025 Patch Tuesday Mitigations
- Qualys Monthly Webinar Series
With cybersecurity threats continuing to evolve, Microsoft’s July 2025 Patch Tuesday highlights the need for consistent patching — this month’s release includes key fixes for actively exploited vulnerabilities. Here’s a
Qualys
Microsoft and Adobe Patch Tuesday, July 2025 Security Update Review
blogs_qualys·2025-07-08
Microsoft and Adobe Patch Tuesday, July 2025 Security Update Review
## Table of Contents
Microsoft Patch Tuesday for July 2025
Adobe Patches for July 2025
Zero-day Vulnerability Patched in July Patch Tuesday Edition
Critical Severity Vulnerabilities Patched in July Patch Tuesday Edition
Other Microsoft Vulnerability Highlights
Microsoft Release Summary
Discover and Prioritize Vulnerabilities inVulnerability Management, Detection & Response (VMDR)
Rapid Response withPatch Management (PM)
EVALUATE Vendor-Suggested Mitigation with Policy Audit
Microsoft July 2025 Patch Tuesday Mitigations
Qualys Monthly Webinar Series
With cybersecurity threats continuing to evolve, Microsoft’s July 2025 Patch Tuesday highlights the need for consistent patching — this month’s release includes key fixes for actively exploited vulnerabilities. Here’s a quick breakdo
2025-07-08
Published