CVE-2026-11967

Arbitrary code execution via winspool.drv sideloading

Published Jun 12, 2026 · Updated Jun 12, 2026

DLL sideloading in Mobatek MobaXterm Personal Edition (Portable) 26.3 allows local users to execute arbitrary code at startup. The portable executable searches its own directory for winspool.drv during startup and loads an attacker-supplied file instead of a trusted system copy. Exploitation requires write access beside the executable and execution of that portable copy, with the payload running in the launching user's context.

CVSS severity8.5
High
EPSS probability0.11%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

DLL sideloading in Mobatek MobaXterm Personal Edition (Portable) 26.3 allows local users to execute arbitrary code at startup. The portable executable searches its own directory for winspool.drv during startup and loads an attacker-supplied file instead of a trusted system copy. Exploitation requires write access beside the executable and execution of that portable copy, with the payload running in the launching user's context.

The record

CVE
CVE-2026-11967
Published
Jun 12, 2026
Updated
Jun 12, 2026
Vendor
Mobatek
Product
MobaXterm
Classifications
CWE-427, T1574.002
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 12, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 12, 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=26.3

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Mobatek · MobaXtermversion=26.3

Published CVSS scores

8.5INCIBECVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

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.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-427Uncontrolled Search Path Element
T1574.002DLL Side-Loading

Public exploit references

No public exploit references are available in this record.

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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