CVE-2022-27481

Device crash via ARP resource race

Published Apr 12, 2022 · Updated Aug 3, 2024

ARP request handling in Siemens SCALANCE W1788 devices before 3.0.0 allows attackers to crash the entire device. The firmware fails to synchronize resource handling across concurrent ARP requests, creating a race condition in the request-processing path. Exploitation requires adjacent-network access and interrupts all device services through a complete device crash; no confidentiality or integrity impact is reported.

CVSS severity7.4
High
EPSS probability0.24%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

ARP request handling in Siemens SCALANCE W1788 devices before 3.0.0 allows attackers to crash the entire device. The firmware fails to synchronize resource handling across concurrent ARP requests, creating a race condition in the request-processing path. Exploitation requires adjacent-network access and interrupts all device services through a complete device crash; no confidentiality or integrity impact is reported.

The record

CVE
CVE-2022-27481
Published
Apr 12, 2022
Updated
Aug 3, 2024
Vendor
Siemens
Product
SCALANCE W1788-2IA M12
Classifications
CWE-362, T0814
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 12, 2022CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=All versions < V3.0.0

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

Siemens · SCALANCE W1788-2IA M12version=All versions < V3.0.0
Siemens · SCALANCE W1788-2 M12version=All versions < V3.0.0
Siemens · SCALANCE W1788-2 EEC M12version=All versions < V3.0.0
Siemens · SCALANCE W1788-1 M12version=All versions < V3.0.0

Published CVSS scores

5.3NIST NVDCVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
5.7NIST NVDAV:A/AC:M/Au:N/C:N/I:N/A:C
7.4Siemens AGCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-362Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
T0814Denial of Service

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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