A vulnerability was identified in Totolink N300RH 6.1c.1353_B20190305. This vulnerability allows manipulation of the argument FileName within the function setUploadSetting of the file /cgi-bin/cstecgi.cgi, leading to file inclusion. The attack may be performed from remote, allowing attackers to exploit the vulnerability without needing any authentication or user interaction.
The vulnerability has a CVSS score of 5.5, classified as medium severity. The risk to organizations includes unauthorized access to sensitive information, which can lead to further attacks or breaches. Since the exploit is publicly available, organizations should prioritize patching this vulnerability to protect their systems.
Organizations should address this vulnerability in their priority patch cycle, as it poses a significant risk given the ease of exploitation. Immediate action is recommended to mitigate potential impacts.
The vulnerability was published on May 2, 2026, and is currently marked as 'Received' in terms of status. With the exploit publicly available, it is essential for organizations to stay vigilant.
Vulnerability Details
The vulnerability affects the Totolink N300RH router, specifically the version 6.1c.1353_B20190305. The relevant function impacted is setUploadSetting, which can be manipulated for file inclusion. The official classification identifies this issue under CWE-73.
The vulnerability has a CVSS 4.0 score of 5.5, indicating a medium severity level. This score reflects the low attack complexity and the lack of required privileges or user interaction. The integrity and availability impacts are both rated as low.
Technical Analysis
The root cause of this vulnerability stems from insufficient input validation in the setUploadSetting function, allowing attackers to manipulate the FileName argument. The attack vector is via network access, making it easily exploitable by remote attackers.
Given the low complexity of the attack, no privileges are required, and user interaction is not necessary. The attack can lead to a low integrity impact and low availability impact, which means that while the system may not crash, the integrity of data can be compromised.
Risk & Impact Analysis
Real-world deployment of the Totolink N300RH router poses significant risk due to this vulnerability. Organizations utilizing this device may face unauthorized access that could lead to data breaches or other malicious activities.
The vulnerability's medium severity rating indicates that while not critical, it should not be ignored. The blast radius potential can be considerable, especially for organizations with poor network segmentation or weak security postures.
Organizations should prioritize remediation efforts based on this analysis and the CVSS score, ensuring that patching is completed as soon as possible to mitigate the risks associated with this vulnerability.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | Yes |
Public PoC | Yes |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
The specific affected version is Totolink N300RH 6.1c.1353_B20190305. If version information is not known, it is recommended to consider all versions prior to vendor patch.
Mitigation & Remediation
Organizations should patch their Totolink N300RH routers to the latest version to remediate this vulnerability. If a patch is unavailable, consider applying configuration hardening measures to restrict access to sensitive functions and monitor network traffic for any anomalies.
Additionally, organizations may benefit from continuous security testing to identify and mitigate similar vulnerabilities in the future. For more details, organizations can explore continuous penetration testing services.
Detection Guidance
Organizations should monitor logs for any unusual file access patterns or unexpected uploads. Behavioral anomalies in router access should be investigated, and network signatures should be established to detect any attempts to exploit this vulnerability.
AppSecure Threat Intelligence Insight
This vulnerability is significant as it highlights the ongoing issues surrounding IoT device security. The ease with which this vulnerability can be exploited serves as a reminder for security teams to prioritize the assessment of all connected devices within their environment.
Organizations should also consider implementing a robust vulnerability management program to systematically address these types of risks.
For an in-depth understanding of IoT vulnerabilities, organizations can refer to resources such as the IoT security best practices guide and the latest trends in IoT security vulnerabilities.
Additionally, organizations should stay informed about emerging threats by regularly consulting IoT security trends to enhance their defensive posture.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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