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Fencer Vulns
medium 6.5

CVE-2025-24008 json

A vulnerability has been identified in SIRIUS 3RK3 Modular Safety System (MSS) (All versions), SIRIUS Safety Relays 3SK2 (All versions).

published 2025-05-13 17 mo ago modified 2026-06-17 4 mo ago also EUVD-2025-14866

cvss
6.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.3%
EPSS 0.3% chance of exploitation in 30 days, percentile 20%
public exploits
0
none known

Summary

A vulnerability has been identified in SIRIUS 3RK3 Modular Safety System (MSS) (All versions), SIRIUS Safety Relays 3SK2 (All versions). The affected devices do not encrypt data in transit. An attacker with network access could eavesdrop the connection and retrieve sensitive information, including obfuscated safety passwords.

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

cisa ICSA-25-135-13 updated cvss 6.5

Siemens SIRIUS

  • Siemens SIRIUS 3RK3 Modular Safety System (MSS)
    affected: mitigation, no fix planned
  • Siemens SIRIUS Safety Relays 3SK2
    affected: mitigation, no fix available

Facts from CISA's republication of the vendor's own advisory (CSAF); the linked advisory is the authoritative source. CISA notification · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
17 mo ago

Exploit prediction

0.27% chance of exploitation in the next 30 days, higher than 20% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 6.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
CNA 4.0 8.7 CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
CNA 4.0 8.7 CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Affected products

  • Siemens SIRIUS 3RK3 Modular Safety System (MSS)
  • Siemens SIRIUS Safety Relays 3SK2

Classification

Weakness
  • CWE-311 Missing Encryption of Sensitive Data

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.