Totolink N300RH Buffer Overflow Vulnerability in Firmware Upgrade Function
Vulnerability
A buffer overflow vulnerability has been identified in the Totolink N300RH router, specifically in version 3.2.4-B20220812. The issue arises in the POST request handler, within the function setUpgradeFW of the file /cgi-bin/cstecgi.cgi. This vulnerability can be exploited remotely by manipulating the FileName argument, leading to a buffer overflow condition.
Impact
Exploitation of this vulnerability can lead to arbitrary code execution or causing the device to crash, disrupting its normal operation.
Added: May 4, 2026, 10:19 AM
Updated: May 4, 2026, 10:19 AM
Vulnerability Rating
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spread
0.0impact
1.3exploitability
8.7remediation
0.0relevance
7.4threat
6.4urgency
2.9incentive
4.2Our algorithm analyzes dozens of metrics to generate these 8 key vulnerability categories, which are then combined to calculate the overall risk score.