CVE-2026-5353Public exploitNetwork attack vector

Authenticated command execution via unchecked ping target

Published Apr 2, 2026 · Updated Apr 2, 2026

OS command injection in TRENDnet TEW-657BRM firmware 1.00.1 allows remote authenticated users to execute commands through setup.cgi. The ping_test handler passes the request's c4_IPAddr value to myPipe without validation, so shell metacharacters introduce arbitrary commands. Access to the router's authenticated web administration interface is required, and injected commands execute on the appliance.

CVSS severity6.3
Medium
EPSS probability5.25%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

OS command injection in TRENDnet TEW-657BRM firmware 1.00.1 allows remote authenticated users to execute commands through setup.cgi. The ping_test handler passes the request's c4_IPAddr value to myPipe without validation, so shell metacharacters introduce arbitrary commands. Access to the router's authenticated web administration interface is required, and injected commands execute on the appliance.

The record

CVE
CVE-2026-5353
Published
Apr 2, 2026
Updated
Apr 2, 2026
Vendor
TRENDnet
Product
TEW-657BRM
Classifications
CWE-78, CWE-77, T1059.004
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 2, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 2, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=1.00.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

TRENDnet · TEW-657BRMversion=1.00.1

Published CVSS scores

2.1VulDBCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P
6.5VulDBAV:N/AC:L/Au:S/C:P/I:P/A:P
6.3VulDBCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
8.8NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
CWE-77Improper Neutralization of Special Elements used in a Command ('Command Injection')
T1059.004Unix Shell

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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