CVE-2026-9513: Totolink CA750-PoE Setting cstecgi.cgi NTPSyncWithHost os command injection
A weakness has been identified in Totolink CA750-PoE 6.2c.510. This issue affects the function NTPSyncWithHost of the file /cgi-bin/cstecgi.cgi of the component Setting Handler. Executing a manipulation of the argument hosttime can lead to os command injection. The attack can be launched remotely. The exploit has been made available to the public and could be used for attacks.
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Configuration
Disable the NTPSyncWithHost function or configure the device to not accept/process the host_time argument. If the device UI does not expose this setting, remove or block the handler until a vendor fix is applied.
Totolink CA750-PoE Setting Handler (/cgi-bin/cstecgi.cgi) NTPSyncWithHost / host_time = disabled or reject host_time input - Compensating control
Restrict access to the device management interface to trusted IPs only (block WAN/untrusted networks). Apply firewall/ACL rules to prevent external access to /cgi-bin/cstecgi.cgi.
- Compensating control
Deploy HTTP filtering or a WAF to block requests targeting /cgi-bin/cstecgi.cgi and/or requests containing the host_time parameter (drop or sanitize such requests at the network edge).
- Operational
Monitor device logs for requests to /cgi-bin/cstecgi.cgi and indicators of OS command execution. Isolate any devices showing signs of compromise and perform recovery (power-cycle, factory reset) and investigation.
- Operational
Contact the vendor (Totolink) for guidance and apply any firmware updates or vendor-supplied patches as soon as they become available.
Event History
Frequently Asked Questions
What is the severity of CVE-2026-9513?
The severity of CVE-2026-9513 is classified as medium with a score of 6.3.
How do I fix CVE-2026-9513?
To fix CVE-2026-9513, update the Totolink CA750-PoE firmware to the latest version provided by the manufacturer.
What type of vulnerability is CVE-2026-9513?
CVE-2026-9513 is an OS command injection vulnerability.
Can CVE-2026-9513 be exploited remotely?
Yes, CVE-2026-9513 can be exploited remotely through manipulation of the host_time argument.
What component of Totolink CA750-PoE is affected by CVE-2026-9513?
CVE-2026-9513 affects the NTPSyncWithHost function in the /cgi-bin/cstecgi.cgi file.