CVE-2025-40743

high

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.

References

https://www.cisa.gov/news-events/ics-advisories/icsa-25-226-19

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

Details

Source: Mitre, NVD

Published: 2025-08-12

Updated: 2025-08-12

Risk Information

CVSS v2

Base Score: 8

Vector: CVSS2#AV:A/AC:L/Au:N/C:C/I:C/A:P

Severity: High

CVSS v3

Base Score: 8.3

Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L

Severity: High

CVSS v4

Base Score: 8.7

Vector: 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

Severity: High

EPSS

EPSS: 0.00019