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CVE-2023-49251

HIGH
8.8
CVSS Score
Published: January 9, 2024 at 10:00 AM UTC
Updated: June 17, 2026 at 06:35 AM UTC
2 products affected across 1 vendorSIMATIC Cn 4100 FirmwareSIMATIC CN 4100

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Severity
HIGH8.8
Exploit prediction
EPSS 0.5%
SSVC
No known exploit

Description

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

SIMATIC Cn 4100 Firmware· Siemens
95%
v < 2.7
siemens-simatic-cn-4100 (same device)
SIMATIC CN 4100· Siemens
60%
All versions < V2.7
Affected range stops below 2.7, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (1)

PatchVendor Advisory
Source: [email protected]
https://cert-portal.siemens.com/productcert/pdf/ssa-777015.pdf

SSVC — Action Prioritization

SSVCNo known exploitNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

8.8HIGHsiemens
Vector?

Quick Info

StatusANALYZED
CWE
CWE-639

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