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Vulnerability record · CVE-2020-25226 · published 12 January 2021

CVE-2020-25226: Siemens scalance x200-4pirt firmware heap-based buffer overflow vulnerability

Siemens · Scalance X200 4pirt Firmware

A vulnerability has been identified in SCALANCE X-200 switch family (incl. SIPLUS NET variants) (All versions < V5.2.5), SCALANCE X-200IRT switch family (incl. SIPLUS NET variants) (All versions < V5.5.0). The web server of the affected devices contains a vulnerability that may lead to a buffer overflow condition. An attacker could cause this condition on the webserver by sending a specially crafted request. The webserver could stop and not recover anymore.

9.8 CVSS 3.1 Critical EPSS 1.7% · top 23.5% CWE-122 · Heap-based buffer overflowCWE-787 · Out-of-bounds write
9.8CVSS 3.1 base score, v2 10.0
1.7%EPSS exploitation probability, 30 days
NoNot in CISA KEV
66Affected product versions listed by NVD
2References
17 Jun 2026Last modified by NVD

Description

A vulnerability has been identified in SCALANCE X-200 switch family (incl. SIPLUS NET variants) (All versions < V5.2.5), SCALANCE X-200IRT switch family (incl. SIPLUS NET variants) (All versions < V5.5.0). The web server of the affected devices contains a vulnerability that may lead to a buffer overflow condition. An attacker could cause this condition on the webserver by sending a specially crafted request. The webserver could stop and not recover anymore.

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

Affected products

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

References

LinkTags
https://cert-portal.siemens.com/productcert/pdf/ssa-139628.pdf Vendor Advisory
https://cert-portal.siemens.com/productcert/pdf/ssa-139628.pdf Vendor Advisory

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Related vulnerabilities

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

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%9.6CVE-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%8.2CVE-2022-26648Siemens 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 0.94%7.4CVE-2023-29054Siemens scalance x200-4p irt firmware inadequate encryption strength 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 0.26%6.5CVE-2020-15799Siemens scalance x200-4pirt firmware missing authentication for critical function 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 1.1%6.1CVE-2022-40631Siemens scalance x200-4p irt firmware cross-site scripting vulnerabilityA vulnerability has been identified in SCALANCE X200-4P IRT (All versions < V5.5.0), SCALANCE X201-3P IRT (All versions < V5.5.0), SCALANCE X201-3P I…EPSS 0.47%5.9CVE-2020-28391Siemens scalance x200-4pirt firmware hard-coded credentials 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 1.1%

Source: NIST National Vulnerability Database (record CVE-2020-25226), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.