CVE-2026-5353

CVE-2026-5353 is a medium-severity vulnerability in Trendnet Tew-657brm Firmware with a CVSS 3.x base score of 6.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-77.

Key facts

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.

Frequently asked questions

What is CVE-2026-5353?
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.
How severe is CVE-2026-5353?
CVE-2026-5353 has a CVSS 3.x base score of 6.3, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.
Is CVE-2026-5353 being actively exploited?
It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 5% (91st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-5353?
CVE-2026-5353 affects Trendnet Tew-657brm Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-5353?
Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-5353 have an EU (EUVD) identifier?
Yes. CVE-2026-5353 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-18408.
When was CVE-2026-5353 published?
CVE-2026-5353 was published on 2026-04-02 and last updated on 2026-06-17.

References

Affected products (1)

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