Siemens SIMATIC CN 4100 up to 2.6 Installation authorization

CVSS Meta Temp Score
CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.
Current Exploit Price (≈)
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CTI Interest Score
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8.7$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as very critical, has been found in Siemens SIMATIC CN 4100 up to 2.6. This impacts an unknown function of the component Installation Handler. Performing a manipulation results in authorization. This vulnerability was named CVE-2023-49251. 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 CN 4100 up to 2.6 (SCADA Software). This affects an unknown functionality of the component Installation Handler. The manipulation with an unknown input leads to a authorization vulnerability. CWE is classifying the issue as CWE-639. The system's authorization functionality does not prevent one user from gaining access to another user's data or record by modifying the key value identifying the data. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

A vulnerability has been identified in SIMATIC CN 4100 (All versions < V2.7). The "intermediate installation" system state of the affected application allows an attacker to add their own login credentials to the device. This allows an attacker to remotely login as root and take control of the device even after the affected device is fully set up.

The weakness was presented 01/09/2024 as ssa-777015. It is possible to read the advisory at cert-portal.siemens.com. This vulnerability is uniquely identified as CVE-2023-49251 since 11/24/2023. 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 12/16/2025).

Upgrading to version 2.7 eliminates this vulnerability.

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

Productinfo

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.8
VulDB Meta Temp Score: 8.7

VulDB Base Score: 8.8
VulDB Temp Score: 8.4
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 8.8
NVD Vector: 🔍

CNA Base Score: 8.8
CNA Vector (Siemens AG): 🔍

CVSSv2info

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

Exploitinginfo

Class: Authorization
CWE: CWE-639 / CWE-285 / CWE-266
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 CN 4100 2.7

Timelineinfo

11/24/2023 🔍
01/09/2024 +46 days 🔍
01/09/2024 +0 days 🔍
12/16/2025 +707 days 🔍

Sourcesinfo

Vendor: siemens.com

Advisory: ssa-777015
Status: Confirmed

CVE: CVE-2023-49251 (🔍)
GCVE (CVE): GCVE-0-2023-49251
GCVE (VulDB): GCVE-100-250083

Entryinfo

Created: 01/09/2024 12:49
Updated: 12/16/2025 21:07
Changes: 01/09/2024 12:49 (51), 01/26/2024 08:49 (11), 12/16/2025 21:07 (19)
Complete: 🔍
Cache ID: 216::103

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