CVE-2025-40817 Missing authorization in LOGO! 12/24RCE
An unauthenticated remote attacker can modify the device time, causing the PLC to behave differently due to missing validation checks.
- 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-2025-40817?
CVE-2025-40817 is a high-severity missing authorization vulnerability in Siemens LOGO! 12/24RCE, published on 11 Nov 2025. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
A vulnerability has been identified in LOGO! 12/24RCE (6ED1052-1MD08-0BA2) (All versions < V1.84.05), LOGO! 12/24RCEo (6ED1052-2MD08-0BA2) (All versions < V1.84.05), LOGO! 230RCE (6ED1052-1FB08-0BA2) (All versions < V1.84.05), LOGO! 230RCEo (6ED1052-2FB08-0BA2) (All versions < V1.84.05), LOGO! 24CE (6ED1052-1CC08-0BA2) (All versions < V1.84.05), LOGO! 24CEo (6ED1052-2CC08-0BA2) (All versions < V1.84.05), LOGO! 24RCE (6ED1052-1HB08-0BA2) (All versions < V1.84.05), LOGO! 24RCEo (6ED1052-2HB08-0BA2) (All versions < V1.84.05), SIPLUS LOGO! 12/24RCE (6AG1052-1MD08-7BA2) (All versions < V1.84.05), SIPLUS LOGO! 12/24RCEo (6AG1052-2MD08-7BA2) (All versions < V1.84.05), SIPLUS LOGO! 230RCE (6AG1052-1FB08-7BA2) (All versions < V1.84.05), SIPLUS LOGO! 230RCEo (6AG1052-2FB08-7BA2) (All versions < V1.84.05), SIPLUS LOGO! 24CE (6AG1052-1CC08-7BA2) (All versions < V1.84.05), SIPLUS LOGO! 24CEo (6AG1052-2CC08-7BA2) (All versions < V1.84.05), SIPLUS LOGO! 24RCE (6AG1052-1HB08-7BA2) (All versions < V1.84.05), SIPLUS LOGO! 24RCEo (6AG1052-2HB08-7BA2) (All versions < V1.84.05). Affected devices do not conduct certain validations when interacting with them. This could allow an unauthenticated remote attacker to change time of the device, which means the device could behave differently.
Weakness: CWE-306
Which versions are affected by CVE-2025-40817?
How do I fix CVE-2025-40817?
No fix has been published for CVE-2025-40817 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2025-40817 being exploited?
There is no known exploitation of CVE-2025-40817 in the wild and no public exploit code.
Sources
Also known as GHSA-rx6m-vh7q-5563.