CVE-2026-76591 TRENDnet CVE debrief

Who should care

TRENDnet TEW-755AP users and administrators, IT security teams, network administrators, and operators of the affected devices should be aware of this vulnerability and take necessary actions to protect their systems. This includes reviewing device versions, applying patches, and monitoring for suspicious activity. Additionally, security teams should prioritize patching or mitigating this vulnerability to prevent potential attacks.

Technical summary

TRENDnet TEW-755AP up to 20260702 has a command injection vulnerability in the log_email_server function of /cgi-bin/email.cgi in the ssi component. The vulnerability can be exploited remotely. This issue affects the ssi component of the device, specifically in the /cgi-bin/email.cgi file. Users of affected versions should take immediate action to mitigate the risk. The vulnerability is confirmed in the ssi component of the /cgi-bin/email.cgi file. Users should verify the version of their devices and check for any available patches. Additionally, defenders should monitor for suspicious activity and implement compensating controls if patches cannot be applied immediately.

Defensive priority

TRENDnet TEW-755AP up to 20260702 ssi log_email_server command injection remote attack

Recommended defensive actions

• Inventory TRENDnet TEW-755AP devices for version 20260702 or earlier
• Apply vendor remediation if available
• Monitor for suspicious activity
• Implement compensating controls
• Exception tracking for unpatched devices
• Review relevant monitoring, detection, and logs for exposed assets that need extra review
• Track exceptions, retest remediated assets, and close the item only after evidence is documented

Evidence notes

TRENDnet TEW-755AP up to 20260702 ssi log_email_server command injection. Official CVE and NVD records confirm vulnerability details. Limited source information available. The vulnerability is confirmed in the ssi component of the /cgi-bin/email.cgi file. Users should verify the version of their devices and check for any available patches. Additionally, defenders should monitor for suspicious activity and implement compensating controls if patches cannot be applied immediately.

Official resources