What’s Vulnerable › Vulnerabilities
CVE-2025-40771
- Severity: critical (CVSS 9.8 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.5% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2025-10-14 · updated 2026-10-23
- Weakness: CWE-306
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
- Siemens SIMATIC CP 1542SP-1: before V2.4.24 — fixed in V2.4.24
- Siemens SIMATIC CP 1542SP-1 IRC: before V2.4.24 — fixed in V2.4.24
- Siemens SIMATIC CP 1543SP-1: before V2.4.24 — fixed in V2.4.24
- Siemens SIPLUS ET 200SP CP 1542SP-1 IRC TX RAIL: before V2.4.24 — fixed in V2.4.24
- Siemens SIPLUS ET 200SP CP 1543SP-1 ISEC: before V2.4.24 — fixed in V2.4.24
- Siemens SIPLUS ET 200SP CP 1543SP-1 ISEC TX RAIL: before V2.4.24 — fixed in V2.4.24
How to fix
Upgrade to a fixed version: Siemens SIMATIC CP 1542SP-1 V2.4.24; Siemens SIMATIC CP 1542SP-1 IRC V2.4.24; Siemens SIMATIC CP 1543SP-1 V2.4.24; Siemens SIPLUS ET 200SP CP 1542SP-1 IRC TX RAIL V2.4.24; Siemens SIPLUS ET 200SP CP 1543SP-1 ISEC V2.4.24; Siemens SIPLUS ET 200SP CP 1543SP-1 ISEC TX RAIL V2.4.24. Check the vendor advisory for mitigations.
References
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