CVE-2026-18368 Heap buffer overflow in Modbusgwd
A remote unauthenticated attacker can cause a denial of service in Teltonika RUTOS devices via a heap buffer overflow in the Modbus gateway.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-18368?
CVE-2026-18368 is a medium-severity memory corruption vulnerability in Teltonika Networks RUTOS, published on 13 Aug 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
In Teltonika Networks RUTOS devices, a vulnerability exists in modbusgwd due to improper handling of Modbus TCP request data. A remote, unauthenticated attacker with access to the affected service could trigger a heap-based buffer overflow, resulting in a denial of service.
Weakness: CWE-122
Which versions are affected by CVE-2026-18368?
How do I fix CVE-2026-18368?
No fix has been published for CVE-2026-18368 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-2026-18368 being exploited?
There is no known exploitation of CVE-2026-18368 in the wild and no public exploit code.
Sources
Also known as GHSA-26g8-9jvg-gfw6.