CVE-2026-5354Public exploitNetwork attack vector

Authenticated command execution via unchecked policy_name parameter

Published Apr 2, 2026 · Updated Apr 2, 2026

OS command injection in TRENDnet TEW-657BRM 1.00.1 allows remote authenticated users to execute commands via policy_name. The /setup.cgi vpn_connect handler passes the request-controlled policy_name value directly to SYSTEM without validation or neutralization. Valid HTTP Basic credentials are required, and successful injection permits execution of commands available through the appliance shell.

CVSS severity8.8
High
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 1.00.1 allows remote authenticated users to execute commands via policy_name. The /setup.cgi vpn_connect handler passes the request-controlled policy_name value directly to SYSTEM without validation or neutralization. Valid HTTP Basic credentials are required, and successful injection permits execution of commands available through the appliance shell.

The record

CVE
CVE-2026-5354
Published
Apr 2, 2026
Updated
Apr 2, 2026
Vendor
TRENDnet
Product
TEW-657BRM
Classifications
CWE-77, CWE-78, T1059
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

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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

6.3VulDBCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
6.5VulDBAV:N/AC:L/Au:S/C:P/I:P/A:P
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
8.8NIST NVDCVSS: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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-77Improper Neutralization of Special Elements used in a Command ('Command Injection')
CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
T1059Command and Scripting Interpreter

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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