CVE intelligence

CVE-2026-56136

Vulnerability intelligence

Published Aug 24, 2026Sources checked Oct 28, 2026

4.7MEDIUMCVSS out of 10

What this means

Review the available evidence

CVE-2026-56136 and is rated Medium severity with a CVSS score of 4.7. It is not in the current CISA KEV record we collected. That does not prove exploitation has not occurred.

What to do next

Remediation and response

Microsoft Security Response Center guidance

Vendor revision: Sep 13, 2026

See the Microsoft Security Update Guide for the update that applies to your product.

Vendor-listed releases

2022.10.3-4

CISA KEVNot listedBased on the latest collected catalog

EPSS0.1%Estimated 30-day exploitation probability

Ransomware useNot markedCISA KEV ransomware field

Threat actors0Source-linked actor relationships

Overview

What is CVE-2026-56136?

In NTFS-3G through 2026.2.25, an out-of-bounds read exists in ntfs_ir_nill() in libntfs-3g/index.c that allows an attacker to read possibly confidential information in an ntfs-3g process by crafting a malicious NTFS image. This read operation is triggered by creation of a file with a crafted name.

Source: NVD