What is the CVSS score of CVE-2025-24993?

CVE-2025-24993 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: 1.5%.

Which versions of Windows are affected by CVE-2025-24993?

Organizations using Heap-based buffer overflow in Windows NTFS face notable risk from CVE-2025-24993, a heap-based buffer overflow vulnerability rated CVSS 7.8.

Is CVE-2025-24993 being actively exploited?

Yes, CVE-2025-24993 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, confirming active in-the-wild exploitation. Immediate patching is required.

How to fix or mitigate CVE-2025-24993?

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

Windows CVE-2025-24993

HIGH

Heap-based Buffer Overflow (CWE-122)

2025-03-11 secure@microsoft.com

Windows Buffer Overflow

7.8

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

7.8 HIGH

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

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

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 - 17:13 cisa

CISA KEV

CVE Published

Mar 11, 2025 - 17:16 nvd

HIGH 7.8

DescriptionCVE.org

Heap-based buffer overflow in Windows NTFS allows an unauthorized attacker to execute code locally.

AnalysisAI

A heap-based buffer overflow in the Windows NTFS driver allows unauthenticated local code execution, providing kernel-level access when a user mounts a crafted NTFS filesystem image. This KEV-listed vulnerability (CVE-2025-24993) targets the most widely used Windows filesystem, making it a significant threat through malicious USB drives, VHD files, or network shares.

Technical ContextAI

The NTFS.sys kernel driver improperly handles certain NTFS metadata structures, leading to a heap buffer overflow in the kernel pool. NTFS is the default and most trusted filesystem on Windows, so the attack surface is broad — any operation that causes Windows to parse NTFS metadata (mounting drives, opening VHDs, browsing network shares) can trigger the vulnerability.

Affected ProductsAI

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

RemediationAI

Apply Microsoft security update immediately. This is KEV-listed — remediate per CISA deadlines. Restrict VHD mounting via Group Policy. Block VHD/VHDX attachments at email gateways. Limit removable media usage on sensitive systems.