What is the CVSS score of CVE-2025-24985?

CVE-2025-24985 has a CVSS 3.1 base score of 7.8 (High). CVSS vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H. EPSS exploitation probability: 1.1%.

Which versions of Windows are affected by CVE-2025-24985?

Organizations using Integer overflow or wraparound in Windows Fast FAT Driver face notable risk from CVE-2025-24985, a heap-based buffer overflow vulnerability rated CVSS 7.8.. A patch is available.

Is there a public PoC exploit available for CVE-2025-24985?

Yes, a public proof-of-concept exploit is available for CVE-2025-24985. Prioritise patching immediately. EPSS: 1.1%.

How to fix or mitigate CVE-2025-24985?

Within 24 hours: Identify all affected systems and apply vendor patches immediately. If patching is delayed, consider network segmentation to limit exposure.

Windows CVE-2025-24985

HIGH

Heap-based Buffer Overflow (CWE-122)

2025-03-11 secure@microsoft.com

Windows

7.8

CVSS 3.1

CVSS VectorNVD

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Attack Vector

Local

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

Analysis Generated

Mar 12, 2026 - 19:52 vuln.today

Added to CISA KEV

Oct 27, 2025 - 17:14 cisa

CISA KEV

PoC Detected

Oct 27, 2025 - 17:14 vuln.today

Public exploit code

Patch released

Oct 27, 2025 - 17:14 nvd

Patch available

CVE Published

Mar 11, 2025 - 17:16 nvd

HIGH 7.8

DescriptionNVD

Integer overflow or wraparound in Windows Fast FAT Driver allows an unauthorized attacker to execute code locally.

AnalysisAI

An integer overflow in the Windows Fast FAT Driver allows unauthenticated local code execution through crafted FAT filesystem images. KEV-listed with public PoC, this vulnerability (CVE-2025-24985) can be triggered by mounting a malicious USB drive or VHD file, making it a potent vector for physical access attacks and social engineering scenarios.

Technical ContextAI

The Windows Fast FAT filesystem driver (fastfat.sys) fails to properly validate integer arithmetic when processing FAT directory entries. An attacker-controlled integer value overflows during size calculation, resulting in an undersized kernel pool allocation. Subsequent data copy overwrites adjacent kernel memory. Because filesystem drivers operate in kernel mode, successful exploitation yields SYSTEM-level code execution.

Affected ProductsAI

Microsoft Windows 10 (all versions) Microsoft Windows 11 Microsoft Windows Server 2016/2019/2022

RemediationAI

Apply Microsoft security update immediately. Disable AutoPlay for removable media. Consider blocking VHD file attachments at email gateway. Group Policy: restrict mounting of removable media on sensitive systems.

CVE-2025-24985 vulnerability details – vuln.today

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Windows CVE-2025-24985

CVSS VectorNVD

Lifecycle Timeline

DescriptionNVD

AnalysisAI

Technical ContextAI

Affected ProductsAI

RemediationAI

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External POC / Exploit Code