CVE-2026-82597
Received Received - Intake

Command Injection in TOTOLINK NR1800X Router

Publication date: 2026-08-31

Last updated on: 2026-08-31

Assigner: VulDB

Description
A vulnerability was identified in TOTOLINK NR1800X 9.1.0u.6681_B20230703. This affects the function setUssd of the file /cgi-bin/cstecgi.cgi. The manipulation of the argument ussd leads to command injection. The attack can be initiated remotely. The exploit is publicly available and might be used.

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published
2026-08-31
Last Modified
2026-08-31
Generated
2026-08-31
AI Q&A
2026-08-31
EPSS Evaluated
N/A
NVD
CVE-2026-82597
EUVD
EUVD-2026-68300

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
totolink nr1800x 9.1.0u.6681_b20230703

Helpful Resources

Exploitability

CWE
CWE Icon
KEV
KEV Icon
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

AI Quick Actions

Instant insights powered by AI
Executive Summary

This vulnerability is a command injection flaw in TOTOLINK NR1800X version 9.1.0u.6681_B20230703. It exists in the setUssd function of the file /cgi-bin/cstecgi.cgi where the ussd argument can be manipulated to execute arbitrary commands. The attack can be performed remotely without requiring authentication.

Detection Guidance

To detect this vulnerability, scan for exposed instances of TOTOLINK NR1800X firmware 9.1.0u.6681_B20230703. Check for open ports 80 or 443 and test the vulnerable endpoint /cgi-bin/cstecgi.cgi with the parameter ussd. Use curl commands like: curl -X POST 'http://<target>/cgi-bin/cstecgi.cgi?setUssd' --data 'ussd=test' to verify if command injection is possible.

Impact Analysis

An attacker could exploit this to execute unauthorized commands on the affected device, potentially gaining control over it. This may lead to data theft, device compromise, or further network infiltration. The public availability of the exploit increases the risk of real-world attacks.

Compliance Impact

This vulnerability could lead to unauthorized access to sensitive data, violating confidentiality requirements in GDPR and HIPAA. Organizations using affected devices may face compliance breaches, legal penalties, and reputational damage due to potential data exposure.

Mitigation Strategies

Immediately update the TOTOLINK NR1800X firmware to the latest patched version. If no patch is available, isolate the device from the network, disable remote access, and block access to /cgi-bin/cstecgi.cgi via firewall rules. Monitor for unusual activity and apply network segmentation.

Chat Assistant

Ask questions about this CVE
Hi! I’m here to help you understand CVE-2026-82597. Ask me anything about the vulnerability, its impact, or mitigation strategies.
0/70

EPSS Chart