CVE-2026-77945 TRENDnet CVE debrief

Who should care

Defenders responsible for TRENDnet TEW-821DAP devices should assess the potential for command injection attacks and prioritize verifying the presence of this vulnerability in their inventory.

Why it matters

This vulnerability allows for command injection in TRENDnet TEW-821DAP devices, which can be exploited remotely. Defenders should prioritize verifying the presence of this vulnerability in their inventory and consider applying patches or mitigations to prevent exploitation.

• Verify the presence of TRENDnet TEW-821DAP devices in your inventory and assess the potential for command injection attacks
• Consider applying patches or mitigations provided by the vendor to prevent exploitation
• Monitor for potential exploitation attempts to detect potential attacks
• Assess the potential impact of a successful exploit on your organization's operations

Technical summary

The vulnerability is located in the /cgi-bin/upload.cgi file of the ssi component in TRENDnet TEW-821DAP 2.2.01b05. It allows for command injection through manipulation of the filename argument, and can be exploited remotely. The vulnerability's CVSS score is 2.1, indicating a low severity. However, defenders should still take necessary precautions to prevent exploitation. The affected product is TRENDnet TEW-821DAP 2.2.01b05, and defenders should prioritize verifying the presence of this vulnerability in their inventory.

Defensive priority

Defenders should prioritize verifying the presence of this vulnerability in their TRENDnet TEW-821DAP devices and assess the potential for command injection attacks.

Recommended defensive actions

• Verify the presence of TRENDnet TEW-821DAP devices in your inventory
• Assess the potential for command injection attacks on the /cgi-bin/upload.cgi file
• Consider applying patches or mitigations provided by the vendor
• Monitor for potential exploitation attempts
• Review compensating controls for exposed systems while remediation is scheduled and verified
• Check 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

The CVE record and NVD detail page provide information on the vulnerability, including its description, CVSS score, and affected product. The CVE record was published on 2026-08-22T11:16:53.243Z and has not been modified since then. The NVD detail page offers additional information on the vulnerability, including its CVSS score and affected product. However, the information available is limited, and defenders should verify the presence of this vulnerability in their inventory. The exploit has been made public, and defenders should be

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.