CVE-2026-9514
Description
A security vulnerability has been detected in Totolink CA750-PoE 6.2c.510. Impacted is the function setNetworkDiag of the file /cgi-bin/cstecgi.cgi of the component Setting Handler. The manipulation of the argument NetDiagHost/NetDiagPingNum/NetDiagPingSize/NetDiagPingTimeOut/NetDiagTracertHop is directly passed by the attacker/so we can control the NetDiagHost/NetDiagPingNum/NetDiagPingSize/NetDiagPingTimeOut/NetDiagTracertHop leads to os command injection. The attack may be initiated remotely. The exploit has been disclosed publicly and may be used.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
OS command injection in Totolink CA750-PoE router's setNetworkDiag function allows remote unauthenticated attackers to execute arbitrary commands.
Vulnerability
The vulnerability exists in the setNetworkDiag function within the /cgi-bin/cstecgi.cgi script of Totolink CA750-PoE firmware version 6.2c.510. The parameters NetDiagHost, NetDiagPingNum, NetDiagPingSize, NetDiagPingTimeOut, and NetDiagTracertHop are passed directly to a command execution context without proper sanitization, leading to OS command injection. [1]
Exploitation
An attacker can exploit this vulnerability remotely by sending a crafted POST request to /cgi-bin/cstecgi.cgi with malicious input in any of the vulnerable parameters. No authentication is required. The public PoC demonstrates setting NetDiagHost to a backtick-enclosed command such as ` telnetd -l /bin/sh -p 8891 ` which results in the router spawning a telnet daemon. [1]
Impact
Successful exploitation allows an attacker to execute arbitrary OS commands on the router with root privileges, potentially leading to full device compromise, data exfiltration, or use as a pivot point for further attacks.
Mitigation
As of the publication date, no official patch is available from Totolink. Users should restrict access to the router's management interface to trusted networks only, and monitor for firmware updates. The vulnerability is publicly known and a PoC is available. [1]
AI Insight generated on May 26, 2026. Synthesized from this CVE's description and the cited reference URLs; citations are validated against the source bundle.
Affected products
2Patches
0No patches discovered yet.
Vulnerability mechanics
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References
5News mentions
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