CVE-2025-40803

Adjacent-network information disclosure via unauthenticated discovery responses

Published Sep 9, 2025 · Updated Sep 9, 2025

Information disclosure in Siemens RUGGEDCOM RST2428P all versions allows remote attackers to read device data over an adjacent network. Discovery services on UDP 34964 and a dynamic UDP port in 49152–65535 return device information to unauthenticated queries without enforcing an access check. The attacker must reach the device's local network; Siemens reports confidentiality impact only and does not identify the exposed fields.

CVSS severity3.1
Low
EPSS probability0.18%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Information disclosure in Siemens RUGGEDCOM RST2428P all versions allows remote attackers to read device data over an adjacent network. Discovery services on UDP 34964 and a dynamic UDP port in 49152–65535 return device information to unauthenticated queries without enforcing an access check. The attacker must reach the device's local network; Siemens reports confidentiality impact only and does not identify the exposed fields.

The record

CVE
CVE-2025-40803
Published
Sep 9, 2025
Updated
Sep 9, 2025
Vendor
Siemens
Product
RUGGEDCOM RST2428P
Classifications
CWE-200, T1046
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 9, 2025CVE publishedPublication date reported by the CVE source.
  2. Sep 9, 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?

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  1. Affected versionversion=0 <*

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

Siemens · RUGGEDCOM RST2428Pversion=0 <*

Published CVSS scores

2.3Siemens AGCVSS:4.0/AV:A/AC:H/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
3.1Siemens AGCVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:L/I:N/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)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-200Exposure of Sensitive Information to an Unauthorized Actor
T1046Network Service Discovery

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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