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CVE-2026-112161— Lack of integrity checks in Mobatek’s MobaXterm

Quick assessment

Affected
Mobatek MobaXterm
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

MobaXterm Personal Edition（便携版）26.4 GA 在提取 CygUtils64.plugin 文件之前，未先验证其完整性。拥有该文件写入权限的本地攻击者可将其中包含的"bin/cygwin1.dll"库替换为恶意库。当受害者启动本地 Shell 会话或使用基于 Cygwin 的功能时，应用程序会提取该组件并加载被篡改的库，从而以受害者的权限执行恶意代码。利用此漏洞需要能够写入该插件文件，其本身并不涉及权限提升。

CVSS 8.5 · High EPSS 0.07% · P0
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I. Basic Information for CVE-2026-112161

Vulnerability Information
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Vulnerability Title
Lack of integrity checks in Mobatek’s MobaXterm
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
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
Source: CVE Program / CVE List V5
Vulnerability Type
对数据真实性的验证不充分
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Mobatek MobaXterm 26.4 GA -

II. Public POCs for CVE-2026-112161

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III. Intelligence Information for CVE-2026-112161

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Vendor Advisories for CVE-2026-112161 (1)

IV. Related Vulnerabilities

Same product: MobaXterm
Same vendor: Mobatek
Same weakness: CWE-345

V. Comments for CVE-2026-112161

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