CVE-2025-40946

Severity: high (CVSS 8.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-05-12 · updated 2026-10-23
Weakness: CWE-321

Description

A vulnerability has been identified in blueplanet 100 NX3 M8 (All versions), blueplanet 100 TL3 GEN2 (All versions < V6.1.4.9), blueplanet 105 TL3 (All versions < V3.92), blueplanet 105 TL3 GEN2 (All versions < V6.1.4.9), blueplanet 110 TL3 (All versions < V3.92), blueplanet 125 NX3 M10 (All versions), blueplanet 125 TL3 (All versions < V3.92), blueplanet 125 TL3 GEN2 (All versions < V6.1.4.9), blueplanet 137 TL3 (All versions < V3.92), blueplanet 150 TL3 (All versions < V3.92), blueplanet 150 TL3 GEN2 (All versions < V6.1.4.9), blueplanet 155 TL3 (All versions < V3.92), blueplanet 155 TL3 GEN2 (All versions < V6.1.4.9), blueplanet 165 TL3 (All versions < V3.92), blueplanet 165 TL3 GEN2 (All versions < V6.1.4.9), blueplanet 3.0 TL3-60.0 TL3 (All versions), blueplanet 87.0 TL3 (All versions < V3.92), blueplanet 87.0 TL3 GEN2 (All versions < V6.1.4.9), blueplanet 92.0 TL3 (All versions < V3.92), blueplanet 92.0 TL3 GEN2 (All versions < V6.1.4.9), blueplanet gridsave 110 TL3-S (All versions < V3.91), blueplanet gridsave 137 TL3-S (All versions < V3.91), blueplanet gridsave 92.0 TL3-S (All versions < V3.91). A CRC16-based algorithm for generating Technical Service credentials could allow an attacker to derive the credentials from the devices serial number and misuse them to gain unauthorized access.

Affected products

Siemens blueplanet 100 NX3 M8: all versions
Siemens blueplanet 100 TL3 GEN2: before V6.1.4.9 — fixed in V6.1.4.9
Siemens blueplanet 105 TL3: before V3.92 — fixed in V3.92
Siemens blueplanet 105 TL3 GEN2: before V6.1.4.9 — fixed in V6.1.4.9
Siemens blueplanet 110 TL3: before V3.92 — fixed in V3.92
Siemens blueplanet 125 NX3 M10: all versions
Siemens blueplanet 125 TL3: before V3.92 — fixed in V3.92
Siemens blueplanet 125 TL3 GEN2: before V6.1.4.9 — fixed in V6.1.4.9
Siemens blueplanet 137 TL3: before V3.92 — fixed in V3.92
Siemens blueplanet 150 TL3: before V3.92 — fixed in V3.92
Siemens blueplanet 150 TL3 GEN2: before V6.1.4.9 — fixed in V6.1.4.9
Siemens blueplanet 155 TL3: before V3.92 — fixed in V3.92
Siemens blueplanet 155 TL3 GEN2: before V6.1.4.9 — fixed in V6.1.4.9
Siemens blueplanet 165 TL3: before V3.92 — fixed in V3.92
Siemens blueplanet 165 TL3 GEN2: before V6.1.4.9 — fixed in V6.1.4.9
Siemens blueplanet 3.0 TL3-60.0 TL3: all versions
Siemens blueplanet 87.0 TL3: before V3.92 — fixed in V3.92
Siemens blueplanet 87.0 TL3 GEN2: before V6.1.4.9 — fixed in V6.1.4.9
Siemens blueplanet 92.0 TL3: before V3.92 — fixed in V3.92
Siemens blueplanet 92.0 TL3 GEN2: before V6.1.4.9 — fixed in V6.1.4.9
Siemens blueplanet gridsave 110 TL3-S: before V3.91 — fixed in V3.91
Siemens blueplanet gridsave 137 TL3-S: before V3.91 — fixed in V3.91
Siemens blueplanet gridsave 92.0 TL3-S: before V3.91 — fixed in V3.91

How to fix

Upgrade to a fixed version: Siemens blueplanet 100 TL3 GEN2 V6.1.4.9; Siemens blueplanet 105 TL3 V3.92; Siemens blueplanet 105 TL3 GEN2 V6.1.4.9; Siemens blueplanet 110 TL3 V3.92; Siemens blueplanet 125 TL3 V3.92; Siemens blueplanet 125 TL3 GEN2 V6.1.4.9; Siemens blueplanet 137 TL3 V3.92; Siemens blueplanet 150 TL3 V3.92; Siemens blueplanet 150 TL3 GEN2 V6.1.4.9; Siemens blueplanet 155 TL3 V3.92; Siemens blueplanet 155 TL3 GEN2 V6.1.4.9; Siemens blueplanet 165 TL3 V3.92. Check the vendor advisory for mitigations.

References

https://cert-portal.siemens.com/productcert/html/ssa-545643.html

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