TRENDnet TEW-657BRM 1.00.1 upgrade_flash.cgi boundary stack-based overflow

CVSS Meta Temp Score
CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.
Current Exploit Price (≈)
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CTI Interest Score
Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
8.3$0-$5k0.00+

Summaryinfo

A vulnerability labeled as very critical has been found in TRENDnet TEW-657BRM 1.00.1. Impacted is an unknown function of the file /usr/sbin/upgrade_flash.cgi. Executing a manipulation of the argument boundary can lead to stack-based overflow. This vulnerability appears as CVE-2026-129352. The attack may be performed from remote. In addition, an exploit is available. 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."

Detailsinfo

A vulnerability was found in TRENDnet TEW-657BRM 1.00.1. It has been declared as very critical. This vulnerability affects an unknown part of the file /usr/sbin/upgrade_flash.cgi. The manipulation of the argument boundary with an unknown input leads to a stack-based overflow vulnerability. The CWE definition for the vulnerability is CWE-121. The product writes past the end of a buffer that was allocated on the stack. As an impact it is known to affect confidentiality, integrity, and availability.

The advisory is available at github.com. This vulnerability was named CVE-2026-129352. The exploitation appears to be easy. The attack can be initiated remotely. Additional levels of successful authentication are necessary for exploitation. Technical details and also a public exploit are known. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 11/14/2026).

It is possible to download the exploit at github.com. It is declared as proof-of-concept. 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."

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

Vendor

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 9.1
VulDB Meta Temp Score: 8.3

VulDB Base Score: 9.1
VulDB Temp Score: 8.3
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Stack-based overflow
CWE: CWE-121 / CWE-119
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Access: Public
Status: Proof-of-Concept
Download: 🔒
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔒

Timelineinfo

11/14/2026 Advisory disclosed
11/14/2026 +0 days VulDB entry created
11/14/2026 +0 days VulDB entry last update

Sourcesinfo

Advisory: github.com
Status: Not defined

CNA: VulDB
CVE: CVE-2026-129352 (🔒)

GCVE (CVE): GCVE-0-2026-129352
GCVE (VulDB): GCVE-100-437398
scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 11/14/2026 07:36
Changes: 11/14/2026 07:36 (56)
Complete: 🔍
Submitter: ruanyi
Cache ID: 216::103

Submitinfo

Accepted

  • Submit #1043522: TRENDnet TEW-657BRM 1.00.1 Stack-based Buffer Overflow (by ruanyi)

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