CVE-2022-33139Network attack vector

Unauthenticated user impersonation via client-side authentication

Published Jun 21, 2022 · Updated Aug 3, 2024

Improper authentication in Siemens Desigo CC, Cerberus DMS, and WinCC OA allows remote attackers to impersonate users. Affected client-server components trust authentication decisions made solely by the client when SSA and Kerberos are both disabled. Network access to that configuration is sufficient to act as another user and issue protocol operations without credentials.

CVSS severity9.8
Critical
EPSS probability1.23%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper authentication in Siemens Desigo CC, Cerberus DMS, and WinCC OA allows remote attackers to impersonate users. Affected client-server components trust authentication decisions made solely by the client when SSA and Kerberos are both disabled. Network access to that configuration is sufficient to act as another user and issue protocol operations without credentials.

The record

CVE
CVE-2022-33139
Published
Jun 21, 2022
Updated
Aug 3, 2024
Vendor
Siemens
Product
Desigo CC
Classifications
CWE-603, CWE-287, T0866
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 21, 2022CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2024Record 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=All versions

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Siemens · Desigo CCversion=All versions
Siemens · SIMATIC WinCC OAversion=All versions in default configuration; version=All versions in non-default configuration
Siemens · Cerberus DMSversion=All versions
Siemens · Desigo CC Compactversion=All versions

Published CVSS scores

9.8NISTCVSS: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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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-603Use of Client-Side Authentication
CWE-287Improper Authentication
T0866Exploitation of Remote Services

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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