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NSClient CVE-2025-34079

| EUVD-2025-19752 HIGH
Code Injection (CWE-94)
2025-07-02 disclosure@vulncheck.com
7.8
CVSS 3.1
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CVSS VectorNVD

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

Lifecycle Timeline

4
EUVD ID Assigned
Mar 16, 2026 - 01:55 euvd
EUVD-2025-19752
Analysis Generated
Mar 16, 2026 - 01:55 vuln.today
PoC Detected
Sep 16, 2025 - 19:53 vuln.today
Public exploit code
CVE Published
Jul 02, 2025 - 20:15 nvd
HIGH 7.8

DescriptionNVD

An authenticated remote code execution vulnerability exists in NSClient++ version 0.5.2.35 when the web interface and ExternalScripts module are enabled. A remote attacker with the administrator password can authenticate to the web interface (default port 8443), inject arbitrary commands as external scripts via the /settings/query.json API, save the configuration, and trigger the script via the /query/{name} endpoint. The injected commands are executed with SYSTEM privileges, enabling full remote compromise.

This capability is an intended feature, but the lack of safeguards or privilege separation makes it risky when exposed to untrusted actors.

Analysis

An authenticated remote code execution vulnerability exists in NSClient++ version 0.5.2.35 when the web interface and ExternalScripts module are enabled. A remote attacker with the administrator password can authenticate to the web interface (default port 8443), inject arbitrary commands as external scripts via the /settings/query.json API, save the configuration, and trigger the script via the /query/{name} endpoint. The injected commands are executed with SYSTEM privileges, enabling full remote compromise.

This capability is an intended feature, but the lack of safeguards or privilege separation makes it risky when exposed to untrusted actors.

Technical ContextAI

Remote code execution allows an attacker to run arbitrary commands or code on the target system over a network without prior authentication. This vulnerability is classified as Code Injection (CWE-94).

RemediationAI

Apply vendor patches immediately. Restrict network access to vulnerable services. Implement network segmentation and monitoring for anomalous activity.

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CVE-2025-34079 vulnerability details – vuln.today

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