CVE-2026-18902
Received Received - Intake

Command Injection in H3C NX15 Firmware

Publication date: 2026-08-05

Last updated on: 2026-08-05

Assigner: VulDB

Description
A vulnerability was detected in H3C NX15 V100R017. Affected by this vulnerability is the function esps.wan.repeater.set/repeaterproc of the file /api/esps. Performing a manipulation of the argument my2P4key results in command injection. Remote exploitation of the attack is possible. The exploit is now public and may be used. The vendor was contacted early about this disclosure.

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Meta Information

Published
2026-08-05
Last Modified
2026-08-05
Generated
2026-08-05
AI Q&A
2026-08-05
EPSS Evaluated
N/A
NVD
CVE-2026-18902
EUVD
EUVD-2026-53045

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
h3c nx15 v100r017

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-77 The product constructs all or part of a command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended command when it is sent to a downstream component.
CWE-74 The product constructs all or part of a command, data structure, or record using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify how it is parsed or interpreted when it is sent to a downstream component.

Attack-Flow Graph

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Executive Summary

CVE-2026-18902 is a command injection vulnerability in H3C NX15 V100R017 firmware. It affects the esps.wan.repeater.set/repeaterproc function in the /api/esps endpoint. Attackers can exploit this by manipulating the my2P4key argument to inject malicious commands. The flaw allows remote code execution after authentication, potentially granting root access.

Detection Guidance

Detecting this vulnerability requires checking for unauthorized access or suspicious activity on H3C NX15 devices running firmware NX15V100R017. Monitor for unexpected network connections to port 2461, unusual command execution logs, or modifications to /tmp/config/repeater_status. Review HTTP requests to /api/esps with the my2P4key parameter containing Unicode escape sequences like \u0027.

Impact Analysis

This vulnerability allows attackers with valid credentials to execute arbitrary commands as root on the device. They could gain full control, modify configurations, or open backdoors like a root shell on port 2461. The router's management IP may change when switching to repeater mode, complicating detection.

Mitigation Strategies

Immediately update the H3C NX15 firmware to a patched version. Disable remote access to the /api/esps endpoint if not required. Rotate all administrative credentials and monitor for signs of exploitation. Block external access to port 2461 and review router logs for unauthorized changes.

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