CVE-2026-86299
Received Received - Intake

Command Injection in Linksys RE7000 Firmware

Publication date: 2026-09-07

Last updated on: 2026-09-07

Assigner: VulDB

Description
A vulnerability was detected in Linksys RE7000 2.0.15. This affects the function platform_event_pingTest of the file /cgi-bin/json.cgi?PingTest of the component PingTest Handler. The manipulation of the argument pingTestIp/pingTestPktSize/pingTestTimes results in os command injection. The attack can be launched remotely. The exploit is now public and may be used.

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Meta Information

Published
2026-09-07
Last Modified
2026-09-07
Generated
2026-09-07
AI Q&A
2026-09-07
EPSS Evaluated
N/A
NVD
CVE-2026-86299
EUVD
EUVD-2026-72349

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
linksys re7000 2.0.15

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-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.

Attack-Flow Graph

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Executive Summary

CVE-2026-86299 is an OS command injection flaw in the Linksys RE7000 v2 AC1900+ Wi-Fi Range Extender firmware v2.0.15. It affects the /goform/PingTest endpoint, which is rewritten to /cgi-bin/json.cgi?PingTest. The vulnerability allows attackers to inject arbitrary commands via parameters like pingTestIp, pingTestPktSize, and pingTestTimes due to improper input validation and shell-metacharacter filtering.

Detection Guidance

To detect this vulnerability, check if your Linksys RE7000 device is running firmware version v2.0.15. Test the /goform/PingTest endpoint by sending a crafted HTTP PUT request with parameters like pingTestIp set to a command injection payload such as '127.0.0.1; id >/tmp/x'. If the command executes and returns output, the device is vulnerable.

Impact Analysis

This vulnerability enables remote attackers to execute arbitrary commands with root privileges on the affected device. Attackers can gain full control over the device, steal sensitive data, or use it as a pivot point for further network attacks. The exploit can be launched remotely without authentication due to weak session token generation.

Mitigation Strategies

Immediately update the Linksys RE7000 firmware to the latest version. Disable remote access to the /goform/PingTest endpoint if possible. Block external access to the device's web interface. Monitor network traffic for suspicious requests to /goform/PingTest or /cgi-bin/json.cgi.

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