CVE-2026-1326
Unknown Unknown - Not Provided
BaseFortify

Publication date: 2026-01-22

Last updated on: 2026-04-29

Assigner: VulDB

Description
A weakness has been identified in Totolink NR1800X 9.1.0u.6279_B20210910. This vulnerability affects the function setWanCfg of the file /cgi-bin/cstecgi.cgi of the component POST Request Handler. This manipulation of the argument Hostname causes command injection. The attack can be initiated remotely. The exploit has been made available to the public and could be used for attacks.
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Meta Information
Published
2026-01-22
Last Modified
2026-04-29
Generated
2026-06-16
AI Q&A
2026-01-22
EPSS Evaluated
2026-06-15
NVD
CVE-2026-1326
EUVD
EUVD-2026-4150
Affected Vendors & Products
Showing 2 associated CPEs
Vendor Product Version / Range
totolink nr1800x_firmware 9.1.0u.6279_b20210910
totolink nr1800x *
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.
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Executive Summary

CVE-2026-1326 is a command injection vulnerability in the Totolink NR1800X router firmware version 9.1.0u.6279_B20210910. It occurs in the setWanCfg function of the /cgi-bin/cstecgi.cgi POST request handler. The vulnerability arises because the Hostname parameter from the POST request is not properly sanitized and is passed directly to a system command function, allowing an attacker to inject and execute arbitrary commands on the device remotely. [1, 2]

Impact Analysis

This vulnerability can allow an attacker to remotely execute arbitrary commands on the affected Totolink NR1800X router, potentially compromising the device's confidentiality, integrity, and availability. Since exploitation requires no authentication and a public exploit exists, attackers can take control of the device, disrupt network operations, or use the device as a foothold for further attacks. [2]

Detection Guidance

Detection can focus on monitoring POST requests to the /cgi-bin/cstecgi.cgi endpoint, specifically looking for suspicious or malformed Hostname parameters that may indicate command injection attempts. Network intrusion detection systems (NIDS) can be configured to alert on unusual POST requests to this endpoint. Additionally, inspecting router logs for unexpected commands or behavior may help. However, no specific detection commands are provided in the available resources. [1, 2]

Mitigation Strategies

Immediate mitigation steps include replacing the affected Totolink NR1800X router firmware version 9.1.0u.6279_B20210910 with an alternative product, as no known countermeasures or patches currently exist. Limiting remote access to the device and monitoring for suspicious activity may also help reduce risk until replacement is possible. [2]

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