CVE-2025-40742

Severity: medium (CVSS 5.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2025-07-08 · updated 2026-06-17
Weakness: CWE-598

Description

A vulnerability has been identified in SIPROTEC 5 6MD84 (CP300) (All versions < V11.0), SIPROTEC 5 6MD85 (CP200) (All versions), SIPROTEC 5 6MD85 (CP300) (All versions < V11.0), SIPROTEC 5 6MD86 (CP200) (All versions), SIPROTEC 5 6MD86 (CP300) (All versions < V11.0), SIPROTEC 5 6MD89 (CP300) (All versions < V11.0), SIPROTEC 5 6MD89 (CP300) V9.6x (All versions < V11.0), SIPROTEC 5 6MU85 (CP300) (All versions < V11.0), SIPROTEC 5 7KE85 (CP200) (All versions), SIPROTEC 5 7KE85 (CP300) (All versions < V11.0), SIPROTEC 5 7SA82 (CP100) (All versions), SIPROTEC 5 7SA82 (CP150) (All versions < V11.0), SIPROTEC 5 7SA84 (CP200) (All versions), SIPROTEC 5 7SA86 (CP200) (All versions), SIPROTEC 5 7SA86 (CP300) (All versions < V11.0), SIPROTEC 5 7SA87 (CP200) (All versions), SIPROTEC 5 7SA87 (CP300) (All versions < V11.0), SIPROTEC 5 7SD82 (CP100) (All versions), SIPROTEC 5 7SD82 (CP150) (All versions < V11.0), SIPROTEC 5 7SD84 (CP200) (All versions), SIPROTEC 5 7SD86 (CP200) (All versions), SIPROTEC 5 7SD86 (CP300) (All versions < V11.0), SIPROTEC 5 7SD87 (CP200) (All versions), SIPROTEC 5 7SD87 (CP300) (All versions < V11.0), SIPROTEC 5 7SJ81 (CP100) (All versions), SIPROTEC 5 7SJ81 (CP150) (All versions < V11.0), SIPROTEC 5 7SJ82 (CP100) (All versions), SIPROTEC 5 7SJ82 (CP150) (All versions < V11.0), SIPROTEC 5 7SJ85 (CP200) (All versions), SIPROTEC 5 7SJ85 (CP300) (All versions < V11.0), SIPROTEC 5 7SJ86 (CP200) (All versions), SIPROTEC 5 7SJ86 (CP300) (All versions < V11.0), SIPROTEC 5 7SK82 (CP100) (All versions), SIPROTEC 5 7SK82 (CP150) (All versions < V11.0), SIPROTEC 5 7SK85 (CP200) (All versions), SIPROTEC 5 7SK85 (CP300) (All versions < V11.0), SIPROTEC 5 7SL82 (CP100) (All versions), SIPROTEC 5 7SL82 (CP150) (All versions < V11.0), SIPROTEC 5 7SL86 (CP200) (All versions), SIPROTEC 5 7SL86 (CP300) (All versions < V11.0), SIPROTEC 5 7SL87 (CP200) (All versions), SIPROTEC 5 7SL87 (CP300) (All versions < V11.0), SIPROTEC 5 7SS85 (CP200) (All versions), SIPROTEC 5 7SS85 (CP300) (All versions < V11.0), SIPROTEC 5 7ST85 (CP200) (All versions), SIPROTEC 5 7ST85 (CP300) (All versions < V11.0), SIPROTEC 5 7ST86 (CP300) (All versions < V11.0), SIPROTEC 5 7SX82 (CP150) (All versions < V11.0), SIPROTEC 5 7SX85 (CP300) (All versions < V11.0), SIPROTEC 5 7SY82 (CP150) (All versions < V11.0), SIPROTEC 5 7UM85 (CP300) (All versions < V11.0), SIPROTEC 5 7UT82 (CP100) (All versions), SIPROTEC 5 7UT82 (CP150) (All versions < V11.0), SIPROTEC 5 7UT85 (CP200) (All versions), SIPROTEC 5 7UT85 (CP300) (All versions < V11.0), SIPROTEC 5 7UT86 (CP200) (All versions), SIPROTEC 5 7UT86 (CP300) (All versions < V11.0), SIPROTEC 5 7UT87 (CP200) (All versions), SIPROTEC 5 7UT87 (CP300) (All versions < V11.0), SIPROTEC 5 7VE85 (CP300) (All versions < V11.0), SIPROTEC 5 7VK87 (CP200) (All versions), SIPROTEC 5 7VK87 (CP300) (All versions < V11.0), SIPROTEC 5 7VU85 (CP300) (All versions < V11.0), SIPROTEC 5 Compact 7SX800 (CP050) (All versions < V11.0). The affected devices include session identifiers in URL requests for certain functionalities. This could allow an attacker to retrieve sensitive session data from browser history, logs, or other storage mechanisms, potentially leading to unauthorized access.

Affected products

Siemens SIPROTEC 5 6MD84 (CP300): before V11.0 — fixed in V11.0
Siemens SIPROTEC 5 6MD85 (CP300): before V11.0 — fixed in V11.0
Siemens SIPROTEC 5 6MD86 (CP300): before V11.0 — fixed in V11.0
Siemens SIPROTEC 5 6MD89 (CP300): before V11.0 — fixed in V11.0
Siemens SIPROTEC 5 6MD89 (CP300) V9.6x: before V11.0 — fixed in V11.0
Siemens SIPROTEC 5 6MU85 (CP300): before V11.0 — fixed in V11.0
Siemens SIPROTEC 5 7KE85 (CP300): before V11.0 — fixed in V11.0
Siemens SIPROTEC 5 7SA82 (CP100): all versions
Siemens SIPROTEC 5 7SA82 (CP150): before V11.0 — fixed in V11.0
Siemens SIPROTEC 5 7SA86 (CP300): before V11.0 — fixed in V11.0
Siemens SIPROTEC 5 7SA87 (CP300): before V11.0 — fixed in V11.0
Siemens SIPROTEC 5 7SD82 (CP100): all versions
Siemens SIPROTEC 5 7SD82 (CP150): before V11.0 — fixed in V11.0
Siemens SIPROTEC 5 7SD86 (CP300): before V11.0 — fixed in V11.0
Siemens SIPROTEC 5 7SD87 (CP300): before V11.0 — fixed in V11.0
Siemens SIPROTEC 5 7SJ81 (CP100): all versions
Siemens SIPROTEC 5 7SJ81 (CP150): before V11.0 — fixed in V11.0
Siemens SIPROTEC 5 7SJ82 (CP100): all versions
Siemens SIPROTEC 5 7SJ82 (CP150): before V11.0 — fixed in V11.0
Siemens SIPROTEC 5 7SJ85 (CP300): before V11.0 — fixed in V11.0
Siemens SIPROTEC 5 7SJ86 (CP300): before V11.0 — fixed in V11.0
Siemens SIPROTEC 5 7SK82 (CP100): all versions
Siemens SIPROTEC 5 7SK82 (CP150): before V11.0 — fixed in V11.0
Siemens SIPROTEC 5 7SK85 (CP300): before V11.0 — fixed in V11.0
Siemens SIPROTEC 5 7SL82 (CP100): all versions
Siemens SIPROTEC 5 7SL82 (CP150): before V11.0 — fixed in V11.0
Siemens SIPROTEC 5 7SL86 (CP300): before V11.0 — fixed in V11.0
Siemens SIPROTEC 5 7SL87 (CP300): before V11.0 — fixed in V11.0
Siemens SIPROTEC 5 7SS85 (CP300): before V11.0 — fixed in V11.0
Siemens SIPROTEC 5 7ST85 (CP300): before V11.0 — fixed in V11.0

How to fix

Upgrade to a fixed version: Siemens SIPROTEC 5 6MD84 (CP300) V11.0; Siemens SIPROTEC 5 6MD85 (CP300) V11.0; Siemens SIPROTEC 5 6MD86 (CP300) V11.0; Siemens SIPROTEC 5 6MD89 (CP300) V11.0; Siemens SIPROTEC 5 6MD89 (CP300) V9.6x V11.0; Siemens SIPROTEC 5 6MU85 (CP300) V11.0; Siemens SIPROTEC 5 7KE85 (CP300) V11.0; Siemens SIPROTEC 5 7SA82 (CP150) V11.0; Siemens SIPROTEC 5 7SA86 (CP300) V11.0; Siemens SIPROTEC 5 7SA87 (CP300) V11.0; Siemens SIPROTEC 5 7SD82 (CP150) V11.0; Siemens SIPROTEC 5 7SD86 (CP300) V11.0. Check the vendor advisory for mitigations.

References

https://cert-portal.siemens.com/productcert/html/ssa-904646.html

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