Vulnerability · Published Aug 19, 2026 · Assigned by VulDB

CVE-2026-76590TRENDnet TEW-755AP ssi wan.cgi stack-based overflow

Critical 9.9

In plain English

A critical-severity stack buffer overflow in TEW-755AP 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 vulnerability was identified in TRENDnet TEW-755AP up to 20260702. Affected by this issue is some unknown functionality of the file /cgi-bin/wan.cgi of the component ssi. Such manipulation of the argument cameo.wan.wan_pppoe_password_00 leads to stack-based buffer overflow. The attack can be executed remotely. The exploit is publicly available and might be used.

Affected products (as reported)

Vendor	Product	Versions
TRENDnet	TEW-755AP	20260702

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-393087 | TRENDnet TEW-755AP ssi wan.cgi stack-based overflow vdb-entry, technical-description
VDB-393087 | CTI Indicators (IOB, IOC, IOA) signature, permissions-required
CVE-2026-76590 | CVE Analysis and Report third-party-advisory
Submit #877850 | TRENDnet TEW-755AP TEW-755AP Stack-based Buffer Overflow third-party-advisory
https://github.com/meishigana/CVE/tree/main/team15_20260702/15_755ap-ssi-bof related
https://github.com/meishigana/CVE/blob/main/team15_20260702/15_755ap-ssi-bof/poc/poc-ssi-overflow.py exploit