CVE-2025-40743

Description

A vulnerability has been identified in SINUMERIK 828D PPU.4 (All versions < V4.95 SP5), SINUMERIK 828D PPU.5 (All versions < V5.25 SP1), SINUMERIK 840D sl (All versions < V4.95 SP5), SINUMERIK MC (All versions < V1.25 SP1), SINUMERIK MC V1.15 (All versions < V1.15 SP5), SINUMERIK ONE (All versions < V6.25 SP1), SINUMERIK ONE V6.15 (All versions < V6.15 SP5). The affected application improperly validates authentication for its VNC access service, allowing access with insufficient password verification. This could allow an attacker to gain unauthorized remote access and potentially compromise system confidentiality, integrity, or availability.

Category

8.7
CVSS
Severity: High
CVSS 4.0 •
CVSS 3.1 •
EPSS 0.02%
Affected: Siemens SINUMERIK 828D PPU.4
Affected: Siemens SINUMERIK 828D PPU.5
Affected: Siemens SINUMERIK 840D sl
Affected: Siemens SINUMERIK MC
Affected: Siemens SINUMERIK MC V1.15
Affected: Siemens SINUMERIK ONE
Affected: Siemens SINUMERIK ONE V6.15
Published at:
Updated at:

References

Link Tags
https://cert-portal.siemens.com/productcert/html/ssa-177847.html

Frequently Asked Questions

What is the severity of CVE-2025-40743?
CVE-2025-40743 has been scored as a high severity vulnerability.
How to fix CVE-2025-40743?
To fix CVE-2025-40743, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2025-40743 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2025-40743 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2025-40743?
CVE-2025-40743 affects Siemens SINUMERIK 828D PPU.4, Siemens SINUMERIK 828D PPU.5, Siemens SINUMERIK 840D sl, Siemens SINUMERIK MC, Siemens SINUMERIK MC V1.15, Siemens SINUMERIK ONE, Siemens SINUMERIK ONE V6.15.
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