CVE-2025-40743

State: Published
Severity: 8.7 High
Published: Aug 12, 2025
Updated: Aug 13, 2025
Reserved: Apr 16, 2025

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.

Scores

CVSS	Score	Vector	Source
4.0	8.7 High	CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N	siemens
3.1	8.3 High	CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L	siemens

Weaknesses

CWE-288 Authentication Bypass Using an Alternate Path or Channel

Affected Products

Product	Versions
SINUMERIK 828D PPU.4Siemens	before V4.95 SP5Affected
SINUMERIK 828D PPU.5Siemens	before V5.25 SP1Affected
SINUMERIK 840D slSiemens	before V4.95 SP5Affected
SINUMERIK MCSiemens	before V1.25 SP1Affected
SINUMERIK MC V1.15Siemens	before V1.15 SP5Affected
SINUMERIK ONESiemens	before V6.25 SP1Affected
SINUMERIK ONE V6.15Siemens	before V6.15 SP5Affected

References

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

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