CVE-2026-129351

TRENDnet TEW-657BRM mini_httpd setup.cgi sprintf out-of-bounds write

Critical 10.0
A public exploit reference is listed

Description

A security vulnerability has been detected in TRENDnet TEW-657BRM 1.00.1. This vulnerability affects the function sprintf of the file /setup.cgi of the component mini_httpd. Such manipulation leads to out-of-bounds write. The attack can be executed remotely. The exploit has been disclosed publicly and may be used. The vendor explains: ""I am not able to confirm if such vulnerability exists as the product has been EOL for more than 15 years. We will send out an announcement letting customers know." This vulnerability only affects products that are no longer supported by the maintainer.

Key facts

Published: 14 Nov 2026
Last changed: 14 Nov 2026
Assigned by: VulDB
EPSS: 0.879% likely to be exploited in the next 30 days, higher than 59.644% of CVEs (scores for 15 Nov 2026)

Severity scores

Each score is shown as its source gave it. They are not averaged or merged.

10.0CVSS 4.0, Criticalfrom the CNA (VulDB)CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:P
10.0CVSS 3.1, Criticalfrom the CNA (VulDB)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H/E:P/RL:X/RC:R
10.0CVSS 3.0, Criticalfrom the CNA (VulDB)CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H/E:P/RL:X/RC:R
10.0CVSS 2.0, Highfrom the CNA (VulDB)AV:N/AC:L/Au:N/C:C/I:C/A:C/E:POC/RL:ND/RC:UR

Historical context and remediation

This reference retains the original CVE publication date. A recent record update does not mean a new attack occurred.

No separately sourced impact summary is available on this page yet. Consult the description, version data and dated exploitation evidence.

No explicit remediation statement is available on this page yet. Consult the original record and vendor references before choosing a fix.

Version statuses below come from the CNA. An “unaffected” version is not necessarily a currently supported release or proof of a patch date. EPSS is a dated risk estimate, not a count of historical attacks.

Read the original CVE record.

Affected products

Vendor	Product	Versions
TRENDnet	TEW-657BRM	1.00.1 (affected)

Timeline

14 Nov 2026 Advisory disclosed
14 Nov 2026 VulDB entry created
14 Nov 2026 VulDB entry last update
14 Nov 2026 Published

Weakness

References

VDB-437397 | TRENDnet TEW-657BRM mini_httpd setup.cgi sprintf out-of-bounds writevdb-entrytechnical-description
VDB-437397 | CTI Indicators (IOB, IOC, IOA)signaturepermissions-required
CVE-2026-129351 | CVE Analysis and Reportthird-party-advisory
Submit #1043518 | TRENDnet TEW-657BRM 1.00.1 Buffer Overflowthird-party-advisory
github.comexploit