What’s Vulnerable › Vulnerabilities

CVE-2019-13926

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2020-02-11 · updated 2026-06-17
• Weakness: CWE-400

Description

A vulnerability has been identified in SCALANCE S602 (All versions >= V3.0 and < V4.1), SCALANCE S612 (All versions >= V3.0 and < V4.1), SCALANCE S623 (All versions >= V3.0 and < V4.1), SCALANCE S627-2M (All versions >= V3.0 and < V4.1). Specially crafted packets sent to port 443/tcp of affected devices could cause a Denial-of-Service condition of the web server. A cold reboot is required to restore the functionality of the device.

Affected products

• Siemens Scalance S602 Firmware: from 3.0 before 4.1 — fixed in 4.1
• Siemens Scalance S612 Firmware: from 3.0 before 4.1 — fixed in 4.1
• Siemens Scalance S623 Firmware: from 3.0 before 4.1 — fixed in 4.1
• Siemens Scalance S627-2M Firmware: from 3.0 before 4.1 — fixed in 4.1

How to fix

Upgrade to a fixed version: Siemens Scalance S602 Firmware 4.1; Siemens Scalance S612 Firmware 4.1; Siemens Scalance S623 Firmware 4.1; Siemens Scalance S627-2M Firmware 4.1. Check the vendor advisory for mitigations.

References

• https://cert-portal.siemens.com/productcert/pdf/ssa-591405.pdf
• https://www.us-cert.gov/ics/advisories/icsa-20-042-10
• https://cert-portal.siemens.com/productcert/pdf/ssa-591405.pdf
• https://www.us-cert.gov/ics/advisories/icsa-20-042-10

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