CVE-2025-24008Network attack vector

Sensitive-data disclosure via unencrypted device communications

Published May 13, 2025 · Updated May 13, 2025

Missing transport encryption in Siemens SIRIUS 3RK3 MSS and 3SK2 Safety Relays allows remote attackers to read sensitive device traffic. PROFINET and serial communications carry sensitive data, including obfuscated safety passwords, without encryption in transit. Network access to an active connection is required; exploitation exposes confidentiality without reported integrity or availability impact.

CVSS severity8.7
High
EPSS probability0.26%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Missing transport encryption in Siemens SIRIUS 3RK3 MSS and 3SK2 Safety Relays allows remote attackers to read sensitive device traffic. PROFINET and serial communications carry sensitive data, including obfuscated safety passwords, without encryption in transit. Network access to an active connection is required; exploitation exposes confidentiality without reported integrity or availability impact.

The record

CVE
CVE-2025-24008
Published
May 13, 2025
Updated
May 13, 2025
Vendor
Siemens
Product
SIRIUS 3RK3 Modular Safety System (MSS)
Classifications
CWE-311, T1040
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 13, 2025CVE publishedPublication date reported by the CVE source.
  2. May 13, 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=0 <*

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Siemens · SIRIUS 3RK3 Modular Safety System (MSS)version=0 <*
Siemens · SIRIUS 3SK2 Safety Relaysversion=0 <*

Published CVSS scores

6.5Siemens AGCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
8.7Siemens AGCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA: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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

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

Weakness, pattern, technique

CWE-311Missing Encryption of Sensitive Data
T1040Network Sniffing

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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