CVE-2026-6421Public exploit

Local code execution via unsafe DLL search

Published Apr 17, 2026 · Updated Apr 17, 2026

Untrusted DLL search in MobaXterm Home Edition 26.0 through 26.1 allows local users to execute code via a crafted msimg32.dll. The executable retains an msimg32.dll dependency that Windows resolves through an uncontrolled search path, allowing a planted copy to load. Low-privileged local access and high-complexity placement are required; payload code runs with the MobaXterm process privileges.

CVSS severity7.0
High
EPSS probability0.15%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Untrusted DLL search in MobaXterm Home Edition 26.0 through 26.1 allows local users to execute code via a crafted msimg32.dll. The executable retains an msimg32.dll dependency that Windows resolves through an uncontrolled search path, allowing a planted copy to load. Low-privileged local access and high-complexity placement are required; payload code runs with the MobaXterm process privileges.

The record

CVE
CVE-2026-6421
Published
Apr 17, 2026
Updated
Apr 17, 2026
Vendor
Mobatek
Product
MobaXterm
Classifications
CWE-426, CWE-427, T1574.001
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 17, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 17, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=26.0
  2. Affected versionversion=26.1

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Mobatek · MobaXtermversion=26.0; version=26.1

Published CVSS scores

6.4VulDBCVSS:4.0/AV:L/AC:H/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P
7.0VulDBCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
6.0VulDBAV:L/AC:H/Au:S/C:C/I:C/A:C

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-426Untrusted Search Path
CWE-427Uncontrolled Search Path Element
T1574.001DLL Search Order Hijacking

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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