What is CVE-2025-40765?

CVE-2025-40765 is a critical-severity vulnerability in Siemens Telecontrol_server_basic, classified under Missing Authentication for Critical Function. CVSS score: 9.8/10. Published 2025-10-14.

How severe is CVE-2025-40765?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Auth bypass in Siemens Telecontrol_server_basic

CVE-2025-40765

A vulnerability has been identified in TeleControl Server Basic V3.1 (All versions >= V3.1.2.2 < V3.1.2.3). The affected application contains an information disclosure vulnerability. This could allow an unauthenticated remote attacker to o…

Vulnerability class: Broken Authentication

EPSS: 0.005 (39.5th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Siemens Telecontrol_server_basic — versions 3.1.2.2
Siemens Telecontrol Server Basic V3.1 — versions V3.1.2.2

Weakness classification (CWE)

CWE-306 — Missing Authentication for Critical Function

References

productcert@siemens.com (Vendor Advisory)

Frequently asked questions

What is CVE-2025-40765?: CVE-2025-40765 is a critical-severity vulnerability in Siemens Telecontrol_server_basic, classified under Missing Authentication for Critical Function. CVSS score: 9.8/10. Published 2025-10-14.
How severe is CVE-2025-40765?: Critical severity. CVSS v3 base score is 9.8 out of 10.