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Vulnerability record · CVE-2023-29054 · published 11 April 2023

CVE-2023-29054: Siemens scalance x200-4p irt firmware inadequate encryption strength vulnerability

Siemens · Scalance X200 4p Irt Firmware

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.

7.4 CVSS 3.1 High EPSS 0.26% · top 84.6% CWE-326 · Inadequate encryption strength
7.4CVSS 3.1 base score
0.26%EPSS exploitation probability, 30 days
NoNot in CISA KEV
13Affected product versions listed by NVD
2References
17 Jun 2026Last modified by NVD

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.

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

Affected products

13 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://cert-portal.siemens.com/productcert/pdf/ssa-479249.pdf Vendor Advisory
https://cert-portal.siemens.com/productcert/pdf/ssa-479249.pdf Vendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2021-25668Siemens scalance x200-4p irt firmware heap-based buffer overflow vulnerabilityA vulnerability has been identified in SCALANCE X200-4P IRT (All versions < 5.5.1), SCALANCE X201-3P IRT (All versions < 5.5.1), SCALANCE X201-3P IRT…EPSS 1.6%9.8CVE-2021-25669Siemens scalance x200-4p irt firmware stack-based buffer overflow vulnerabilityA vulnerability has been identified in SCALANCE X200-4P IRT (All versions < 5.5.1), SCALANCE X201-3P IRT (All versions < 5.5.1), SCALANCE X201-3P IRT…EPSS 2.1%9.8CVE-2021-29998Windriver vxworks out-of-bounds write vulnerabilityAn issue was discovered in Wind River VxWorks before 6.5. There is a possible heap overflow in dhcp client.EPSS 2.4%9.8CVE-2020-15800Siemens scalance x200-4pirt firmware heap-based buffer overflow vulnerabilityA vulnerability has been identified in SCALANCE X-200 switch family (incl. SIPLUS NET variants) (All versions < V5.2.5), SCALANCE X-200IRT switch fam…EPSS 1.7%9.8CVE-2020-25226Siemens scalance x200-4pirt firmware heap-based buffer overflow vulnerabilityA vulnerability has been identified in SCALANCE X-200 switch family (incl. SIPLUS NET variants) (All versions < V5.2.5), SCALANCE X-200IRT switch fam…EPSS 1.7%9.6CVE-2022-26649Siemens scalance x204-2 firmware classic buffer overflow vulnerabilityA 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 I…EPSS 1.3%8.8CVE-2022-26647Siemens scalance x200-4p irt firmware vulnerabilityA 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 I…EPSS 1.1%8.7CVE-2020-28400Siemens dk standard ethernet controller evaluation kit firmware allocation without limits vulnerabilityAffected devices contain a vulnerability that allows an unauthenticated attacker to trigger a denial of service condition. The vulnerability can be t…EPSS 1.9%

Source: NIST National Vulnerability Database (record CVE-2023-29054), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.