CVE-2023-49251 json
A vulnerability has been identified in SIMATIC CN 4100 (All versions < V2.7).
published 2024-01-09 2 y ago modified 2026-06-17 4 mo ago also EUVD-2023-53253
- cvss
- 8.8
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.5%
- EPSS 0.5% chance of exploitation in 30 days, percentile 44%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- siemens simatic_cn_4100_firmware 2.7
Vendor advisories
What the vendors themselves say about their products: affected, fixed or not affected, and what to do.
cisa ICSA-24-011-09 updated cvss 8.8
Siemens SIMATIC CN 4100
-
Siemens SIMATIC CN 4100 <V2.7affected: fixed in V2.7 support.industry.siemens.com
Facts from CISA's republication of the vendor's own advisory (CSAF); the linked advisory is the authoritative source. CISA notification · csaf
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- total
- Assessed
- 2 y ago
Exploit prediction
0.53% chance of exploitation in the next 30 days, higher than 44% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 8.8 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C |
| CNA | 3.1 | 8.8 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| NVD | 3.1 | 8.8 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
Affected products
- Siemens SIMATIC CN 4100
Classification
- Weakness
-
- CWE-639 Authorization Bypass Through User-Controlled Key
References
-
cert-portal.siemens.com
/productcert/pdf/ssa-777015.pdf
patch, vendor-advisory
Sources
- CVE List CVE-2023-49251
- NVD CVE-2023-49251
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