CVE-2025-40765Network attack vector

Unauthenticated database access via exposed password hashes

Published Oct 14, 2025 · Updated Oct 14, 2025

Missing authentication in Siemens TeleControl Server Basic 3.1.2.2 allows remote attackers to obtain user password hashes from its database service. The service on default TCP port 8000 exposes the hashes without authentication, and its Authenticate operation accepts a hash itself as the credential. No account or user interaction is required; a retrieved hash permits authenticated database operations, including adding an administrative product user.

CVSS severity9.8
Critical
EPSS probability0.53%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Missing authentication in Siemens TeleControl Server Basic 3.1.2.2 allows remote attackers to obtain user password hashes from its database service. The service on default TCP port 8000 exposes the hashes without authentication, and its Authenticate operation accepts a hash itself as the credential. No account or user interaction is required; a retrieved hash permits authenticated database operations, including adding an administrative product user.

The record

CVE
CVE-2025-40765
Published
Oct 14, 2025
Updated
Oct 14, 2025
Vendor
Siemens
Product
TeleControl Server Basic
Classifications
CWE-306, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 14, 2025CVE publishedPublication date reported by the CVE source.
  2. Oct 14, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=V3.1.2.2 <V3.1.2.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Siemens · TeleControl Server Basicversion=V3.1.2.2 <V3.1.2.3

Published CVSS scores

9.3Siemens ProductCERTCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
9.8Siemens ProductCERTCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-306Missing Authentication for Critical Function
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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