What is CVE-2026-77945?

CVE-2026-77945 is a high-severity vulnerability in Trendnet Tew-821dap, classified under Improper Neutralization of Special Elements in Output Used by a Downstream Component (Injection). CVSS score: 7.4/10. Published 2026-08-22.

How severe is CVE-2026-77945?

High severity. CVSS v3 base score is 7.4 out of 10.

RCE in Trendnet Tew-821dap

CVE-2026-77945

A vulnerability was found in TRENDnet TEW-821DAP 2.2.01b05. Affected is an unknown function of the file /cgi-bin/upload.cgi of the component ssi. Performing a manipulation of the argument filename results in command injection. The attack may be initiated remotely. The exploit has been made public and could be used.

Published 2026-08-22 · last modified 2026-08-25.

CVSS v3 metric

CVSS v3 base score 7.4 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:L.

EPSS exploit prediction

EPSS: 0.018 (77.3th percentile), scored 2026-10-06.

Low probability of exploitation in the next 30 days, but still tracked. 77th percentile — 77.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.013 · newest: 0.018 · change: +0.005

Affected products

Trendnet Tew-821dap — versions 2.2.01b05

Weakness classification (CWE)

References

vuldb.com/vuln/394174 (technical-description, vdb-entry)
vuldb.com/vuln/394174/cti (signature, permissions-required)
vuldb.com/cve/CVE-2026-77945 (third-party-advisory)
vuldb.com/submit/881248 (third-party-advisory)
github.com/dxz0069/WAVLINK-WN530H4-Command-Injection-in-set_add_routing/blob/ma… (exploit)

Frequently asked questions

What is CVE-2026-77945?: CVE-2026-77945 is a high-severity vulnerability in Trendnet Tew-821dap, classified under Improper Neutralization of Special Elements in Output Used by a Downstream Component (Injection). CVSS score: 7.4/10. Published 2026-08-22.
How severe is CVE-2026-77945?: High severity. CVSS v3 base score is 7.4 out of 10.