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TI-2025-27233 Aliases CVE-2025-40771GHSA-8x4j-8hhc-j8jf

Missing authentication in Siemens SIMATIC CP 1542SP-1

Priority MEDIUM 41CWE-306Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Security bypass
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-306.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00528 44th percentileScored 2026-11-07
Fix Fixed SIMATIC CP 1542SP-1 (Siemens): V2.4.24SIMATIC CP 1542SP-1 IRC (Siemens): V2.4.24+4 more products

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
SiemensSIMATIC CP 1542SP-1before V2.4.24V2.4.24Patch availableCNA
SiemensSIMATIC CP 1542SP-1 IRCbefore V2.4.24V2.4.24Patch availableCNA
SiemensSIMATIC CP 1543SP-1before V2.4.24V2.4.24Patch availableCNA
SiemensSIPLUS ET 200SP CP 1542SP-1 IRC TX RAILbefore V2.4.24V2.4.24Patch availableCNA
SiemensSIPLUS ET 200SP CP 1543SP-1 ISECbefore V2.4.24V2.4.24Patch availableCNA
SiemensSIPLUS ET 200SP CP 1543SP-1 ISEC TX RAILbefore V2.4.24V2.4.24Patch availableCNA
  • SIMATIC CP 1542SP-1 VendorSiemens Affected before V2.4.24 Fixed in V2.4.24 Patch available CNA
  • SIMATIC CP 1542SP-1 IRC VendorSiemens Affected before V2.4.24 Fixed in V2.4.24 Patch available CNA
  • SIMATIC CP 1543SP-1 VendorSiemens Affected before V2.4.24 Fixed in V2.4.24 Patch available CNA
  • SIPLUS ET 200SP CP 1542SP-1 IRC TX RAIL VendorSiemens Affected before V2.4.24 Fixed in V2.4.24 Patch available CNA
  • SIPLUS ET 200SP CP 1543SP-1 ISEC VendorSiemens Affected before V2.4.24 Fixed in V2.4.24 Patch available CNA
  • SIPLUS ET 200SP CP 1543SP-1 ISEC TX RAIL VendorSiemens Affected before V2.4.24 Fixed in V2.4.24 Patch available CNA

Remediation

  • Fix · CNA SIMATIC CP 1542SP-1 (Siemens) Fixed in V2.4.24
  • Fix · CNA SIMATIC CP 1542SP-1 IRC (Siemens) Fixed in V2.4.24
  • Fix · CNA SIMATIC CP 1543SP-1 (Siemens) Fixed in V2.4.24
  • Fix · CNA SIPLUS ET 200SP CP 1542SP-1 IRC TX RAIL (Siemens) Fixed in V2.4.24
  • Fix · CNA SIPLUS ET 200SP CP 1543SP-1 ISEC (Siemens) Fixed in V2.4.24
  • Fix · CNA SIPLUS ET 200SP CP 1543SP-1 ISEC TX RAIL (Siemens) Fixed in V2.4.24

Timeline

  1. 2026-10-02 Threatist record created from CVE-2025-40771
  2. 2026-10-03 Alias added: GHSA-8x4j-8hhc-j8jf

References

Other 1

  • TI-2026-20057 Authentication bypass in Fortinet FortiWeb KEVCVSS 3.1CRITICAL 9.4
  • TI-2025-26358 tls: fix handling of zero-length records on the rx_list KEVCVSS 3.1CRITICAL 9.8
  • TI-2025-18911 Heap-based buffer overflow in Fortinet FortiSwitchManager KEVCVSS 3.1CRITICAL 9.8
  • TI-2025-09686 Type confusion in Google Chrome KEVCVSS 3.1CRITICAL 9.8
  • TI-2022-07142 Code injection in Spring Framework KEVCVSS 3.1CRITICAL 9.8
  • TI-2021-19919 Apache Log4j2 JNDI features do not protect against attacker controlled LDAP and other JNDI related endpoints KEVCVSS 3.1CRITICAL 10.0
See all 2487 →

Sources

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