CVE-2026-15027
Received Received - Intake

OS Command Injection in CGServiSign

Publication date: 2026-09-23

Last updated on: 2026-09-23

Assigner: TWCERT/CC

Description
CGServiSign developed by Changing has a OS Command Injection vulnerability. Unauthenticated remote attackers can induce victims to visit a malicious web page and inject arbitrary OS commands through the local service interface, resulting in command execution on the victim's local computer.

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Meta Information

Published
2026-09-23
Last Modified
2026-09-23
Generated
2026-09-23
AI Q&A
2026-09-23
EPSS Evaluated
N/A
NVD
CVE-2026-15027
EUVD
EUVD-2026-85168

Affected Vendors & Products

Showing 2 associated CPEs
Vendor Product Version / Range
changing nhiservisign to 1.0.26.0625 (inc)
ε…¨ζ™―θ»Ÿι«” nhiservisign to 1.0.26.0625 (inc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-78 The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component.

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Executive Summary

CVE-2026-15027 is an OS Command Injection vulnerability in CGServiSign, a software developed by Changing and ε…¨ζ™―θ»Ÿι«”. The flaw allows unauthenticated remote attackers to trick victims into visiting a malicious webpage. This webpage injects arbitrary OS commands through the local service interface, which are then executed on the victim's local computer.

Detection Guidance

Detecting this vulnerability requires checking if NHIServisign for Linux version 1.0.23.1227 is installed. Use commands like 'dpkg -l | grep NHIServisign' on Debian-based systems or 'rpm -qa | grep NHIServisign' on RPM-based systems to verify the version.

Impact Analysis

This vulnerability can allow attackers to execute arbitrary commands on your local machine without authentication. This could lead to unauthorized access, data theft, installation of malware, or system damage. Users of the affected NHIServisign Linux version 1.0.23.1227 are at risk if they visit a malicious webpage.

Compliance Impact

This vulnerability allows unauthenticated remote attackers to execute arbitrary OS commands on a victim's local machine by tricking them into visiting a malicious webpage. Such command execution could lead to unauthorized data access, modification, or exfiltration, which may violate GDPR's data protection requirements or HIPAA's safeguards for protected health information.

Mitigation Strategies

Immediately update NHIServisign to version 1.0.26.0625 or later. Disable the service if an update is not immediately possible. Monitor network traffic for suspicious activity related to command injection attempts.

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