CVE-2025-51390
CriticalCVSS 9.8Exploitation Probability (EPSS)
High risk76th percentile - higher than 76% of all known CVEs
Summary
A command injection vulnerability was discovered in the TOTOLINK N600R router running firmware version V4.3.0cu.7647_B20210106. The issue resides in the setWiFiWpsConfig function via the pin parameter.
Risk Assessment
An attacker can remotely execute arbitrary system commands on the device, leading to full compromise of the router and potential network takeover.
Recommendation
Immediately update the TOTOLINK N600R firmware to the latest available version. If no update is available, restrict administrative access to trusted networks only.
Other vulnerabilities in TOTOLINK N600R
See all- CVE-2026-79911Critical
TOTOLINK N600R 4.3.0cu.7647_B20210106 has a stack-based buffer overflow vulnerability in the setSystemConfig function of /cgi-bin/cstecgi.cgi. Manipulation of the Hostname argument leads to buffer overflow, which can be exploited remotely. The exploit has been publicly disclosed.
- CVE-2025-46060Critical
A buffer overflow vulnerability was found in the TOTOLINK N600R router firmware version 4.3.0cu.7866_B2022506. A remote attacker can exploit the UPLOAD_FILENAME component to execute arbitrary code.
- CVE-2026-82555Low
Vulnerability in TOTOLINK N600R in the loginAuth function of cstecgi.cgi leads to insufficiently random values. Remote attack is possible but has high complexity and difficulty.
- CVE-2026-79912High
A vulnerability was detected in TOTOLINK N600R 4.3.0cu.7647_B20210106. The impacted element is the function getCurrentTime of the file /cgi-bin/cstecgi.cgi. Performing a manipulation of the argument ntp_server results in command injection. The attack can be initiated remotely. The exploit is now public and may be used.
- CVE-2025-11444High
A security vulnerability has been detected in TOTOLINK N600R up to 4.3.0cu.7866_B20220506 in the setWiFiBasicConfig function of the /cgi-bin/cstecgi.cgi file in the HTTP Request Handler component. Manipulation of the wepkey argument leads to buffer overflow. The attack can be launched remotely, and the exploit has been publicly disclosed.
Original NVD description (English source)
TOTOLINK N600R V4.3.0cu.7647_B20210106 was discovered to contain a command injection vulnerability via the pin parameter in the setWiFiWpsConfig function.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS