CVE-2026-5355: A vulnerability has been found in Trendnet TEW-657BRM 1.00.1

This month

MEDIUM 6.3MITIGATE

CVE-2026-5355 is a medium-severity flaw (CVSS 6.3) affecting tew-657brm firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A vulnerability has been found in Trendnet TEW-657BRM 1.00.1. Affected by this issue is the function vpn_drop of the file /setup.cgi. The manipulation of the argument policy_name leads to os command injection. The attack is possible to be carried out remotely. The exploit has been disclosed to the 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 m

Why this priority

EPSS top 8%: very likely to be exploited
Public exploit reference

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	6.3 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	5.2% (top 8%)
CISA exploited list	No
Weakness	CWE-77, CWE-78
Published	2026-04-02
Last modified	2026-07-24

Publisher (CNA): VulDB · Vendor: trendnet

Last updated 2026-07-24 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-04-02 17:16 UTCPublished CVE record published
2026-07-24 20:10 UTCUpdated Record last modified

trendnet tew-657brm firmware MITIGATE

Affected: 1.00.1

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.00.1

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-5355?

tew-657brm firmware: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2026-5355 being exploited?

CVE-2026-5355 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-5355 affect?

CVE-2026-5355 affects tew-657brm firmware. Severity is medium (CVSS 6.3). A vulnerability has been found in Trendnet TEW-657BRM 1.00.1. Affected by this issue is the function vpn_drop of the file /setup.cgi. The manipulation of the argument policy_name leads to os command injection. The attack is possible to be c

How urgent is CVE-2026-5355?

Priority 50/100. EPSS top 8%: very likely to be exploited; Public exploit reference

Related CVEs

CVE-2026-5349 HIGH 8.8 MITIGATE A vulnerability was identified in Trendnet TEW-657BRM 1.00.1
CVE-2026-5350 HIGH 8.8 MITIGATE A security flaw has been discovered in Trendnet TEW-657BRM 1.00.1
CVE-2026-5351 MEDIUM 6.3 MITIGATE A weakness has been identified in Trendnet TEW-657BRM 1.00.1
CVE-2026-5352 MEDIUM 6.3 MITIGATE A security vulnerability has been detected in Trendnet TEW-657BRM 1.00.1
CVE-2026-5353 MEDIUM 6.3 MITIGATE A vulnerability was detected in Trendnet TEW-657BRM 1.00.1

References

← Back to latest CVEs