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TI-2026-04681 Aliases CVE-2026-5350GHSA-g7rc-cpg5-3v55

Trendnet TEW-657BRM setup.cgi update_pcdb stack-based overflow

Priority HIGH 73CWE-119Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-119 and the CVSS impact.

Summary

A security flaw has been discovered in Trendnet TEW-657BRM 1.00.1. The impacted element is the function update_pcdb of the file /setup.cgi. The manipulation of the argument mac_pc_dba results in stack-based buffer overflow. The attack can be launched remotely. The exploit has been released to the public and may be used for attacks. The vendor confirms, that "[t]he product in question (...) has been discontinued and end of life since June 23, 2011, that is more than 14 years ago. We no longer provide support for this product, so we are not able to confirm the vulnerabilities. We will make an announcement on our website's product support page and notify customers who registered their products with us." This vulnerability only affects products that are no longer supported by the maintainer.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00829 57th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by the CNA and NVD
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
TRENDnetTEW-657BRM1.00.1—No fix listedCNA
  • TEW-657BRM VendorTRENDnet Affected 1.00.1 Fixed in — No fix listed CNA

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:o:trendnet:tew-657brm_firmware:1.00.1:*:*:*:*:*:*:*1.00.1VulnerableTRENDnet
cpe:2.3:h:trendnet:tew-657brm:-:*:*:*:*:*:*:*not specified by NVDRunning onTRENDnet
  • cpe:2.3:o:trendnet:tew-657brm_firmware:1.00.1:*:*:*:*:*:*:* Versions 1.00.1 Vulnerable ·TRENDnet
  • cpe:2.3:h:trendnet:tew-657brm:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·TRENDnet

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-5350
  2. 2026-10-03 Alias added: GHSA-g7rc-cpg5-3v55

References

Exploit 1

  • TI-2026-04680 Trendnet TEW-657BRM setup.cgi add_apcdb stack-based overflow CVSS 4.0HIGH 8.7
  • TI-2025-40287 TRENDnet TEW-657BRM 1.00.1 has an authenticated remote OS command injection vulnerability… CVSS 3.1HIGH 8.0
  • TI-2026-04686 Trendnet TEW-657BRM setup.cgi vpn_drop os command injection CVSS 4.0MEDIUM 5.3
  • TI-2026-04685 Trendnet TEW-657BRM setup.cgi vpn_connect os command injection CVSS 4.0MEDIUM 5.3
  • TI-2026-04684 Trendnet TEW-657BRM setup.cgi ping_test os command injection CVSS 4.0MEDIUM 5.3
  • TI-2026-04683 Trendnet TEW-657BRM setup.cgi edit os command injection CVSS 4.0MEDIUM 5.3
See all 7 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences