CVE-2026-54800 Misconfiguration in CPCI85 Central Processing/Communication
Default insecure OPC UA settings in Siemens industrial systems allow attackers to gain unauthorized control over critical functions.
- 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-2026-54800?
CVE-2026-54800 is a medium-severity vulnerability in Siemens CPCI85 Central Processing/Communication, published on 9 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A vulnerability has been identified in CPCI85 Central Processing/Communication (All versions < V26.20), SICORE Base system (All versions < V26.20.0). The affected application ships with a default configuration that disables all OPC UA security mechanisms. This could allow an attacker to gain unauthorized access and control over critical system functions.
Weakness: CWE-1188
Which versions are affected by CVE-2026-54800?
How do I fix CVE-2026-54800?
No fix has been published for CVE-2026-54800 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-54800 being exploited?
There is no known exploitation of CVE-2026-54800 in the wild and no public exploit code.
Sources
Also known as GHSA-6556-7hqh-p69q.