Is CVE-2026-40706 actively exploited?

No active exploitation of CVE-2026-40706 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-40706 be exploited remotely?

No. CVE-2026-40706 requires local access to exploit.

What is the CVSS score of CVE-2026-40706?

CVE-2026-40706 has a CVSS score of 8.4 (HIGH).

HOME VULNERABILITIESCVE-2026-40706

HIGH

CVE-2026-40706

CWE-122Published: April 21, 2026· Updated: Apr 22, 2026

8.4

CVSS v3.1

EPSS:0.01%probability of exploitation in 30 daysPercentile:2.0th

Official Description

In NTFS-3G 2022.10.3 before 2026.2.25, a heap buffer overflow exists in ntfs_build_permissions_posix() in acls.c that allows an attacker to corrupt heap memory in the SUID-root ntfs-3g binary by crafting a malicious NTFS image. The overflow is triggered on the READ path (stat, readdir, open) when processing a security descriptor with multiple ACCESS_DENIED ACEs containing WRITE_OWNER from distinct group SIDs.

NVD Source

Technical Analysis

CVE-2026-40706 requires local access, meaning attackers must already have a foothold on the target system.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 8.4.