CVE-2025-40743CWE-288

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…

High · published August 12, 2025

CVSS v4.0
8.7
EPSS
0%
Percentile
14.5
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v4.0
8.7 · HIGH
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
EPSS
0.00242 · 14.5th percentile
Weakness
CWE-288 · Authentication Bypass Using an Alternate Path or Channel
Published
2025-08-12T11:17Z
EPSS history
Timeline
  • 12 AUG 11:17Z
    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…
    cvelistv5