Vulnerability · Published Oct 14, 2025 · Assigned by siemens
CVE-2025-40771
Critical 9.8
In plain English
A critical-severity missing authentication in SIMATIC CP 1542SP-1 from Siemens. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 45% of all known vulnerabilities).
Official description
A vulnerability has been identified in SIMATIC CP 1542SP-1 (6GK7542-6UX00-0XE0) (All versions < V2.4.24), SIMATIC CP 1542SP-1 IRC (6GK7542-6VX00-0XE0) (All versions < V2.4.24), SIMATIC CP 1543SP-1 (6GK7543-6WX00-0XE0) (All versions < V2.4.24), SIPLUS ET 200SP CP 1542SP-1 IRC TX RAIL (6AG2542-6VX00-4XE0) (All versions < V2.4.24), SIPLUS ET 200SP CP 1543SP-1 ISEC (6AG1543-6WX00-7XE0) (All versions < V2.4.24), SIPLUS ET 200SP CP 1543SP-1 ISEC TX RAIL (6AG2543-6WX00-4XE0) (All versions < V2.4.24). Affected devices do not properly authenticate configuration connections. This could allow an unauthenticated remote attacker to access the configuration data.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Siemens | SIMATIC CP 1542SP-1 | 0 – before V2.4.24 |
| Siemens | SIMATIC CP 1542SP-1 IRC | 0 – before V2.4.24 |
| Siemens | SIMATIC CP 1543SP-1 | 0 – before V2.4.24 |
| Siemens | SIPLUS ET 200SP CP 1542SP-1 IRC TX RAIL | 0 – before V2.4.24 |
| Siemens | SIPLUS ET 200SP CP 1543SP-1 ISEC | 0 – before V2.4.24 |
| Siemens | SIPLUS ET 200SP CP 1543SP-1 ISEC TX RAIL | 0 – before V2.4.24 |
Weakness: CWE-306 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H