CVE-2026-81855 Wärtsilä FOS-Onboard Use of Hard-coded Cryptographic Key
Attackers can exploit a hard-coded cryptographic key in the Wärtsilä FOS-Onboard robot testing framework to bypass authentication and potentially take over accounts.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-81855?
CVE-2026-81855 is a critical vulnerability in Wärtsilä FOS-Onboard, published on 15 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A hardcoded cryptographic client authentication key vulnerability exists in the robot testing framework component of Wärtsilä FOS-Onboard.
Weakness: CWE-321
Which versions are affected by CVE-2026-81855?
How do I fix CVE-2026-81855?
No fix has been published for CVE-2026-81855 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-81855 being exploited?
There is no known exploitation of CVE-2026-81855 in the wild and no public exploit code.
Sources
Also known as GHSA-j2xg-7hvh-hxm5.