CVE-2023-37373Network attack vector

Arbitrary file writes via unauthenticated messages

Published Aug 8, 2023 · Updated Feb 27, 2025

Missing authentication in Siemens RUGGEDCOM CROSSBOW before 5.4 allows remote attackers to write arbitrary files via file-write messages. Siemens identifies the affected server application's file-write message handler but does not disclose how it fails to authenticate those messages. Exploitation requires user interaction despite requiring no privileges, and successful writes alter the application's file system.

CVSS severity5.3
Medium
EPSS probability0.54%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Missing authentication in Siemens RUGGEDCOM CROSSBOW before 5.4 allows remote attackers to write arbitrary files via file-write messages. Siemens identifies the affected server application's file-write message handler but does not disclose how it fails to authenticate those messages. Exploitation requires user interaction despite requiring no privileges, and successful writes alter the application's file system.

The record

CVE
CVE-2023-37373
Published
Aug 8, 2023
Updated
Feb 27, 2025
Vendor
Siemens
Product
RUGGEDCOM CROSSBOW
Classifications
CWE-306, T1105
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 8, 2023CVE publishedPublication date reported by the CVE source.
  2. Feb 27, 2025Record 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 < V5.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Siemens · RUGGEDCOM CROSSBOWversion=All versions < V5.4

Published CVSS scores

5.3Siemens AGCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:N
7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-306Missing Authentication for Critical Function
T1105Ingress Tool Transfer

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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