CVE-2026-5353

Trendnet TEW-657BRM setup.cgi ping_test os command injection

HIGH
8.8
CVSS Score
Published: April 2, 2026 at 04:15 PM UTC
Updated: July 24, 2026 at 08:20 PM UTC
2 products affected across 1 vendorTew 657BRM FirmwareTRENDnet TEW-657BRM

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Severity
HIGH8.8
Exploit prediction
EPSS 5%
SSVC
PoC

Description

A vulnerability was detected in Trendnet TEW-657BRM 1.00.1. Affected is the function ping_test of the file /setup.cgi. Performing a manipulation of the argument c4_IPAddr results in os command injection. Remote exploitation of the attack is possible. The exploit is now public and may be used. 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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

trendnet-tew-657brm (same device)
All versions

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (4)

VDB EntryTechnical DescriptionThird Party Advisory
Source: cverecord
https://vuldb.com/vuln/354706
SignaturePermissions RequiredVDB Entry
Source: cverecord
https://vuldb.com/vuln/354706/cti
Third Party AdvisoryVDB Entry
Source: cverecord
https://vuldb.com/submit/781566

SSVC — Action Prioritization

SSVCPoCNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

Attack Vector
NETWORK
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusANALYZED
CWE
CWE-78CWE-77

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