What is CVE-2026-77988?

CVE-2026-77988 is a medium-severity vulnerability in Trendnet Tew-823dru, classified under Improper Neutralization of Special Elements in Output Used by a Downstream Component (Injection). CVSS score: 6.6/10. Published 2026-08-22.

How severe is CVE-2026-77988?

Medium severity. CVSS v3 base score is 6.6 out of 10.

RCE in Trendnet Tew-823dru

CVE-2026-77988

A weakness has been identified in TRENDnet TEW-823DRU 1.1.02b01. This vulnerability affects the function nvram_get of the component CLI Configuration Tool. This manipulation causes command injection. The attack is possible to be carried out remotely. The exploit has been made available to the public and could be used for attacks.

Published 2026-08-22 · last modified 2026-08-24.

CVSS v3 metric

CVSS v3 base score 6.6 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:L.

EPSS exploit prediction

EPSS: 0.024 (83.5th percentile), scored 2026-10-07.

Low probability of exploitation in the next 30 days, but still tracked. 83rd percentile — 83.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.021 · newest: 0.024 · change: +0.003

Affected products

Trendnet Tew-823dru — versions 1.1.02b01

Weakness classification (CWE)

References

vuldb.com/vuln/394178 (technical-description, vdb-entry)
vuldb.com/vuln/394178/cti (signature, permissions-required)
vuldb.com/cve/CVE-2026-77988 (third-party-advisory)
vuldb.com/submit/881256 (third-party-advisory)
github.com/dxz0069/WAVLINK-WN530H4-Command-Injection-in-set_add_routing/blob/ma… (exploit)

Frequently asked questions

What is CVE-2026-77988?: CVE-2026-77988 is a medium-severity vulnerability in Trendnet Tew-823dru, classified under Improper Neutralization of Special Elements in Output Used by a Downstream Component (Injection). CVSS score: 6.6/10. Published 2026-08-22.
How severe is CVE-2026-77988?: Medium severity. CVSS v3 base score is 6.6 out of 10.