CVE-2026-10066 Shibby Tomato UPS Service tomatoups.cgi sub_9068 stack-based overflow
Remote attackers can exploit a stack-based buffer overflow in the UPS service of unsupported Shibby Tomato firmware 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-2026-10066?
CVE-2026-10066 is a high-severity memory corruption vulnerability in Shibby Tomato, published on 29 May 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
A security vulnerability has been detected in Shibby Tomato up to 1.28. This issue affects the function sub_9068 of the file tomatoups.cgi of the component UPS Service. The manipulation leads to stack-based buffer overflow. The attack can be initiated remotely. This project is superseded by FreshTomato. This vulnerability only affects products that are no longer supported by the maintainer.
Which versions are affected by CVE-2026-10066?
How do I fix CVE-2026-10066?
No fix has been published for CVE-2026-10066 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-2026-10066 being exploited?
There is no known exploitation of CVE-2026-10066 in the wild and no public exploit code.
Sources
Also known as GHSA-5f6x-gjgm-pqx4.