CVE-2022-27481

Severity: medium (CVSS 5.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2022-04-12 · updated 2026-06-17
Weakness: CWE-362

Description

A vulnerability has been identified in SCALANCE W1788-1 M12 (All versions < V3.0.0), SCALANCE W1788-2 EEC M12 (All versions < V3.0.0), SCALANCE W1788-2 M12 (All versions < V3.0.0), SCALANCE W1788-2IA M12 (All versions < V3.0.0). Affected devices do not properly handle resources of ARP requests. This could allow an attacker to cause a race condition that leads to a crash of the entire device.

Affected products

Siemens Scalance W1788-1 M12 Firmware: before 3.0.0 — fixed in 3.0.0
Siemens Scalance W1788-2 Eec M12 Firmware: before 3.0.0 — fixed in 3.0.0
Siemens Scalance W1788-2 M12 Firmware: before 3.0.0 — fixed in 3.0.0
Siemens Scalance W1788-2Ia M12 Firmware: before 3.0.0 — fixed in 3.0.0

How to fix

Upgrade to a fixed version: Siemens Scalance W1788-1 M12 Firmware 3.0.0; Siemens Scalance W1788-2 Eec M12 Firmware 3.0.0; Siemens Scalance W1788-2 M12 Firmware 3.0.0; Siemens Scalance W1788-2Ia M12 Firmware 3.0.0. Check the vendor advisory for mitigations.

References

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