CVE-2026-112161

Lack of integrity checks in Mobatek’s MobaXterm

Published Oct 19, 2026 CVSS 4.0 · 8.5 High EPSS < 1% KEV · Not listed
Description
MobaXterm Personal Edition (Portable) 26.4 GA extracts the CygUtils64.plugin file without first verifying its integrity. A local attacker with write permissions on this file can replace the ‘bin/cygwin1.dll’ library contained within it with a malicious library. When the victim opens a Local Shell session or uses a Cygwin-based function, the application extracts the component and loads the tampered library, executing code with the victim’s permissions. Exploitation requires write access to the plugin and does not, in itself, involve privilege escalation.

Remediation

Vendor Solution

Update MobaXterm to version 26.5, released on 11 September 2026, or to a later version.

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
Description MobaXterm Personal Edition (Portable) 26.4 GA extracts the CygUtils64.plugin file without first verifying its integrity. A local attacker with write permissions on this file can replace the ‘bin/cygwin1.dll’ library contained within it with a malicious library. When the victim opens a Local Shell session or uses a Cygwin-based function, the application extracts the component and loads the tampered library, executing code with the victim’s permissions. Exploitation requires write access to the plugin and does not, in itself, involve privilege escalation.
Title Lack of integrity checks in Mobatek’s MobaXterm
First Time appeared Mobatek
Mobatek mobaxterm
Weaknesses CWE-345
CPEs cpe:2.3:a:mobatek:mobaxterm:26.4_ga:*:*:*:*:*:*:*
Vendors & Products Mobatek
Mobatek mobaxterm
References
Metrics cvssV4_0

{'score': 8.5, 'vector': 'CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
INCIBE
Published
Updated
Oct 20, 2026, 6:20 PM
Reserved
Oct 19, 2026, 7:34 AM
Status
Deferred
Published
Oct 19, 2026, 9:17 AM
Modified
Oct 20, 2026, 7:17 PM