What is CVE-2026-75976?

CVE-2026-75976 is a critical-severity vulnerability in Trendnet Tew-823dru, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 9.9/10. Published 2026-08-19.

How severe is CVE-2026-75976?

Critical severity. CVSS v3 base score is 9.9 out of 10.

Buffer overflow in Trendnet Tew-823dru

CVE-2026-75976

A weakness has been identified in TRENDnet TEW-823DRU 1.1.02b01. Impacted is the function strcpy of the file /cgi-bin/wan.cgi of the component NVRAM. This manipulation of the argument wan_l2tp_password causes stack-based buffer overflow. The attack can be initiated remotely. The exploit has been made available to the public and could be used for attacks.

Vulnerability class: Buffer Overflow

CVSS v3 metric

CVSS v3 base score 9.9 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H.

Affected products

Trendnet Tew-823dru — versions 1.1.02b01

Weakness classification (CWE)

References

cna@vuldb.com (technical-description, vdb-entry)
cna@vuldb.com (signature, permissions-required)
cna@vuldb.com (third-party-advisory)
cna@vuldb.com (third-party-advisory)
cna@vuldb.com (related)
cna@vuldb.com (exploit)

Frequently asked questions

What is CVE-2026-75976?: CVE-2026-75976 is a critical-severity vulnerability in Trendnet Tew-823dru, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 9.9/10. Published 2026-08-19.
How severe is CVE-2026-75976?: Critical severity. CVSS v3 base score is 9.9 out of 10.