Vulnerability · Published Aug 18, 2026 · Assigned by VulDB

CVE-2026-75976TRENDnet TEW-823DRU NVRAM wan.cgi strcpy stack-based overflow

Critical 9.9

In plain English

A critical-severity stack buffer overflow in TEW-823DRU from TRENDnet. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.9% (higher than 58% of all known vulnerabilities).

Severity (CVSS 3.1)9.9Critical

Exploit odds (30 days)0.9%top 41.5% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

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.

Affected products (as reported)

Vendor	Product	Versions
TRENDnet	TEW-823DRU	1.1.02b01

Weakness: CWE-121, CWE-119 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:P/RL:X/RC:R

References

VDB-391892 | TRENDnet TEW-823DRU NVRAM wan.cgi strcpy stack-based overflow vdb-entry, technical-description
VDB-391892 | CTI Indicators (IOB, IOC, IOA) signature, permissions-required
CVE-2026-75976 | CVE Analysis and Report third-party-advisory
Submit #877796 | TRENDnet TEW-823DRU TEW-823DRU Stack-based Buffer Overflow third-party-advisory
https://github.com/meishigana/CVE/tree/main/team15_20260702/10_823dru-rc-bof related
https://github.com/meishigana/CVE/blob/main/team15_20260702/10_823dru-rc-bof/poc/poc-rc-overflow.py exploit