Siemens SIMATIC CP 1542SP-1 prior 2.4.24 missing authentication

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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9.6$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as critical, has been found in Siemens SIMATIC CP 1542SP-1, SIMATIC CP 1542SP-1 IRC, SIMATIC CP 1543SP-1, SIPLUS ET 200SP CP 1542SP-1 IRC TX RAIL, SIPLUS ET 200SP CP 1543SP-1 ISEC and SIPLUS ET 200SP CP 1543SP-1 ISEC TX RAIL. The impacted element is an unknown function. Performing a manipulation results in missing authentication. This vulnerability was named CVE-2025-40771. The attack may be initiated remotely. There is no available exploit. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability classified as very critical has been found in Siemens SIMATIC CP 1542SP-1, SIMATIC CP 1542SP-1 IRC, SIMATIC CP 1543SP-1, SIPLUS ET 200SP CP 1542SP-1 IRC TX RAIL, SIPLUS ET 200SP CP 1543SP-1 ISEC and SIPLUS ET 200SP CP 1543SP-1 ISEC TX RAIL. This affects an unknown functionality. The manipulation with an unknown input leads to a missing authentication vulnerability. CWE is classifying the issue as CWE-306. The product does not perform any authentication for functionality that requires a provable user identity or consumes a significant amount of resources. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

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.

It is possible to read the advisory at cert-portal.siemens.com. This vulnerability is uniquely identified as CVE-2025-40771 since 04/16/2025. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 10/14/2025).

Upgrading to version 2.4.24 eliminates this vulnerability.

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 9.8
VulDB Meta Temp Score: 9.6

VulDB Base Score: 9.8
VulDB Temp Score: 9.4
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 9.8
CNA Vector (siemens): 🔒

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Missing authentication
CWE: CWE-306 / CWE-287
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: SIMATIC CP 1542SP-1/SIMATIC CP 1542SP-1 IRC/SIMATIC CP 1543SP-1/SIPLUS ET 200SP CP 1542SP-1 IRC TX RAIL/SIPLUS ET 200SP CP 1543SP-1 ISEC/SIPLUS ET 200SP CP 1543SP-1 ISEC TX RAIL 2.4.24

Timelineinfo

04/16/2025 CVE reserved
10/14/2025 +181 days Advisory disclosed
10/14/2025 +0 days VulDB entry created
10/14/2025 +0 days VulDB entry last update

Sourcesinfo

Vendor: siemens.com

Advisory: ssa-486936
Status: Confirmed

CVE: CVE-2025-40771 (🔒)
GCVE (CVE): GCVE-0-2025-40771
GCVE (VulDB): GCVE-100-328203

Entryinfo

Created: 10/14/2025 12:01
Changes: 10/14/2025 12:01 (76)
Complete: 🔍
Cache ID: 216::103

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