CVE-2026-5350 Trendnet TEW-657BRM setup.cgi update_pcdb stack-based overflow
Remote attackers can exploit a stack-based buffer overflow in the discontinued Trendnet TEW-657BRM router to execute arbitrary code.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-5350?
CVE-2026-5350 is a high-severity memory corruption vulnerability in Trendnet TEW-657BRM, published on 2 Apr 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
A security flaw has been discovered in Trendnet TEW-657BRM 1.00.1. The impacted element is the function update_pcdb of the file /setup.cgi. The manipulation of the argument mac_pc_dba results in stack-based buffer overflow. The attack can be launched remotely. The exploit has been released to the public and may be used for attacks. 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.
Which versions are affected by CVE-2026-5350?
It affects 1 product.
Products include Trendnet Tew-657brm Firmware.
How do I fix CVE-2026-5350?
No fix has been published for CVE-2026-5350 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-5350 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-5350 exists.
Other vulnerabilities in Trendnet TEW-657BRM
- CVE-2026-5349 Trendnet TEW-657BRM setup.cgi add_apcdb stack-based overflow
- CVE-2025-65202 Command injection in n/a
- CVE-2026-5351 Trendnet TEW-657BRM setup.cgi add_wps_client os command injection
- CVE-2026-5352 Trendnet TEW-657BRM setup.cgi edit os command injection
- CVE-2026-5353 Trendnet TEW-657BRM setup.cgi ping_test os command injection
Sources
Also known as GHSA-g7rc-cpg5-3v55.