CVE-2023-27309Network attack vector

Unauthorized writes via unchecked query permissions

Published Mar 14, 2023 · Updated Feb 27, 2025

Missing authorization in Siemens RUGGEDCOM CROSSBOW before 5.2 allows remote authenticated users to perform unauthorized write actions. The client query handler accepts specific write queries without verifying that the authenticated account has the required permissions. An authenticated account with network access to the handler can therefore alter application data beyond its assigned permissions; Siemens has not disclosed the affected query names.

CVSS severity8.8
High
EPSS probability0.48%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Missing authorization in Siemens RUGGEDCOM CROSSBOW before 5.2 allows remote authenticated users to perform unauthorized write actions. The client query handler accepts specific write queries without verifying that the authenticated account has the required permissions. An authenticated account with network access to the handler can therefore alter application data beyond its assigned permissions; Siemens has not disclosed the affected query names.

The record

CVE
CVE-2023-27309
Published
Mar 14, 2023
Updated
Feb 27, 2025
Vendor
Siemens
Product
RUGGEDCOM CROSSBOW
Classifications
CWE-862, T1078
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 14, 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 < V5.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Siemens · RUGGEDCOM CROSSBOWversion=All versions < V5.2

Published CVSS scores

5.0Siemens AGCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:O/RC:C
8.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-862Missing Authorization
T1078Valid Accounts

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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