Is CVE-2026-6421 actively exploited?

No active exploitation of CVE-2026-6421 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-6421 be exploited remotely?

No. CVE-2026-6421 requires local access to exploit.

What is the CVSS score of CVE-2026-6421?

CVE-2026-6421 has a CVSS score of 7.0 (HIGH).

HOME VULNERABILITIESCVE-2026-6421

HIGH

CVE-2026-6421

CWE-426Published: April 17, 2026· Updated: Apr 22, 2026

7.0

CVSS v3.1

EPSS:0.01%probability of exploitation in 30 daysPercentile:0.2th

Official Description

A vulnerability has been found in Mobatek MobaXterm Home Edition up to 26.1. This affects an unknown part in the library msimg32.dll. The manipulation leads to uncontrolled search path. An attack has to be approached locally. The attack is considered to have high complexity. It is indicated that the exploitability is difficult. The exploit has been disclosed to the public and may be used. Upgrading to version 26.2 is able to mitigate this issue. It is suggested to upgrade the affected component. The vendor was contacted early, responded in a very professional manner and quickly released a fixed version of the affected product.

NVD Source

Technical Analysis

CVE-2026-6421 requires local access, meaning attackers must already have a foothold on the target system.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

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 7.0.