CVE-2026-76590

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

9.4 Critical

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.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: Low
Privileges needed: Low
User interaction: None

What an attacker can affect

Confidentiality: High
Integrity: High
Availability: High

Exploit likelihood

0.85%Up 0.2 points since Aug 20, 2026

What each source reports

CVE List Score used 9.4

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

Record: CVE-2026-76590
CVSS 4.0: 9.4 CriticalCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:P
CVSS 3.1: 9.9 CriticalCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:P/RL:X/RC:R
CVSS 3.0: 9.9 CriticalCVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:P/RL:X/RC:R
CVSS 2.0: 9.0 AV:N/AC:L/Au:S/C:C/I:C/A:C/E:POC/RL:ND/RC:UR
Weakness: CWE-121, CWE-119
Updated: 2026-11-02

EUVDEUVD-2026-62973 9.4

Record: EUVD-2026-62973
CVSS 4.0: 9.4 CriticalCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:P
Updated: 2026-11-02

GitHub AdvisoriesGHSA-8258-pcm7-hvmv 8.6

A vulnerability was identified in TRENDnet TEW-755AP up to 20260702. Affected by this issue is...

Record: GHSA-8258-pcm7-hvmv
CVSS 4.0: 8.6 HighCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CVSS 3.1: 9.9 CriticalCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Weakness: CWE-119
Updated: 2026-11-02

NVD 8.6

Record: CVE-2026-76590
CVSS 4.0: 8.6 HighCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CVSS 3.1: 9.9 CriticalCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
CVSS 2.0: 9.0 HighAV:N/AC:L/Au:S/C:C/I:C/A:C
Weakness: CWE-119, CWE-121
Updated: 2026-11-02

Affected products

trendnet tew-755ap

History

History
Recorded	Changed	Sources
Nov 2, 2026	first indexed	CVE List, EUVD, GitHub Advisories, NVD

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2026-76590 is a critical vulnerability (CVSS 9.4) in Trendnet Tew-755ap, published August 19, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.85%, the 58th percentile. No source names a fixed version.