CVE-2022-22518Network attack vector

Anonymous service access via incomplete policy revocation

Published Apr 7, 2022 · Updated Sep 17, 2024

Incorrect user management in CODESYS Control runtimes allows remote attackers to retain anonymous service access after it is disabled. The CmpUserMgr deactivation path removes Anonymous_ users and groups for only one registered component instead of every component registered through UserMgrRegisterAnonymousLogin(). The flaw requires anonymous login to have been enabled and then disabled; remaining components, including OPC UA, retain their configured read or write rights.

CVSS severity6.5
Medium
EPSS probability0.61%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Incorrect user management in CODESYS Control runtimes allows remote attackers to retain anonymous service access after it is disabled. The CmpUserMgr deactivation path removes Anonymous_ users and groups for only one registered component instead of every component registered through UserMgrRegisterAnonymousLogin(). The flaw requires anonymous login to have been enabled and then disabled; remaining components, including OPC UA, retain their configured read or write rights.

The record

CVE
CVE-2022-22518
Published
Apr 7, 2022
Updated
Sep 17, 2024
Vendor
CODESYS GmbH
Product
CODESYS Control Runtime System Toolkit
Classifications
CWE-276, CWE-286, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 7, 2022CVE publishedPublication date reported by the CVE source.
  2. Sep 17, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=V3.5.18.0 <V3.5.18.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

CODESYS GmbH · CODESYS Control Runtime System Toolkitversion=V3.5.18.0 <V3.5.18.0
CODESYS GmbH · CODESYS Control for Beckhoff CX9020 SLversion=V4.5.0.0 <V4.5.0.0
CODESYS GmbH · CODESYS Control for BeagleBone SLversion=V4.5.0.0 <V4.5.0.0
CODESYS GmbH · CODESYS Control for IOT2000 SLversion=V4.5.0.0 <V4.5.0.0
CODESYS GmbH · CODESYS Control for emPC-A/iMX6 SLversion=V4.5.0.0 <V4.5.0.0
CODESYS GmbH · CODESYS Control for Linux SLversion=V4.5.0.0 <V4.5.0.0
CODESYS GmbH · CODESYS Control for PFC100 SLversion=V4.5.0.0 <V4.5.0.0
CODESYS GmbH · CODESYS Control for WAGO Touch Panels 600 SLversion=V4.5.0.0 <V4.5.0.0
CODESYS GmbH · CODESYS Control for PFC200 SLversion=V4.5.0.0 <V4.5.0.0
CODESYS GmbH · CODESYS Control for Raspberry Pi SLversion=V4.5.0.0 <V4.5.0.0

Published CVSS scores

6.4NIST NVDAV:N/AC:L/Au:N/C:P/I:P/A:N
6.5CODESYS GmbHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

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-276Incorrect Default Permissions
CWE-286Incorrect User Management
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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