What’s Vulnerable › Vulnerabilities

CVE-2023-29054

• Severity: high (CVSS 7.4 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2023-04-11 · updated 2026-10-23
• Weakness: CWE-326

Description

A vulnerability has been identified in SCALANCE X200-4P IRT (All versions < V5.5.2), SCALANCE X201-3P IRT (All versions < V5.5.2), SCALANCE X201-3P IRT PRO (All versions < V5.5.2), SCALANCE X202-2IRT (All versions < V5.5.2), SCALANCE X202-2IRT (All versions < V5.5.2), SCALANCE X202-2P IRT (All versions < V5.5.2), SCALANCE X202-2P IRT PRO (All versions < V5.5.2), SCALANCE X204IRT (All versions < V5.5.2), SCALANCE X204IRT (All versions < V5.5.2), SCALANCE X204IRT PRO (All versions < V5.5.2), SCALANCE XF201-3P IRT (All versions < V5.5.2), SCALANCE XF202-2P IRT (All versions < V5.5.2), SCALANCE XF204-2BA IRT (All versions < V5.5.2), SCALANCE XF204IRT (All versions < V5.5.2), SIPLUS NET SCALANCE X202-2P IRT (All versions < V5.5.2). The SSH server on affected devices is configured to offer weak ciphers by default. This could allow an unauthorized attacker in a man-in-the-middle position to read and modify any data passed over the connection between legitimate clients and the affected device.

Affected products

• Siemens Scalance X200-4P Irt Firmware: before 5.5.2 — fixed in 5.5.2
• Siemens Scalance X201-3P Irt Firmware: before 5.5.2 — fixed in 5.5.2
• Siemens Scalance X201-3P Irt Pro Firmware: before 5.5.2 — fixed in 5.5.2
• Siemens Scalance X202-2Irt Firmware: before 5.5.2 — fixed in 5.5.2
• Siemens Scalance X202-2P Irt Firmware: before 5.5.2 — fixed in 5.5.2
• Siemens Scalance X202-2P Irt Pro Firmware: before 5.5.2 — fixed in 5.5.2
• Siemens Scalance X204Irt Firmware: before 5.5.2 — fixed in 5.5.2
• Siemens Scalance X204Irt Pro Firmware: before 5.5.2 — fixed in 5.5.2
• Siemens Scalance Xf201-3P Irt Firmware: before 5.5.2 — fixed in 5.5.2
• Siemens Scalance Xf202-2P Irt Firmware: before 5.5.2 — fixed in 5.5.2
• Siemens Scalance Xf204-2Ba Irt Firmware: before 5.5.2 — fixed in 5.5.2
• Siemens Scalance Xf204Irt Firmware: before 5.5.2 — fixed in 5.5.2
• Siemens Siplus Net Scalance X202-2P Irt Firmware: before 5.5.2 — fixed in 5.5.2

How to fix

Upgrade to a fixed version: Siemens Scalance X200-4P Irt Firmware 5.5.2; Siemens Scalance X201-3P Irt Firmware 5.5.2; Siemens Scalance X201-3P Irt Pro Firmware 5.5.2; Siemens Scalance X202-2Irt Firmware 5.5.2; Siemens Scalance X202-2P Irt Firmware 5.5.2; Siemens Scalance X202-2P Irt Pro Firmware 5.5.2; Siemens Scalance X204Irt Firmware 5.5.2; Siemens Scalance X204Irt Pro Firmware 5.5.2; Siemens Scalance Xf201-3P Irt Firmware 5.5.2; Siemens Scalance Xf202-2P Irt Firmware 5.5.2; Siemens Scalance Xf204-2Ba Irt Firmware 5.5.2; Siemens Scalance Xf204Irt Firmware 5.5.2. Check the vendor advisory for mitigations.

References

• https://cert-portal.siemens.com/productcert/pdf/ssa-479249.pdf
• https://cert-portal.siemens.com/productcert/pdf/ssa-479249.pdf

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