CVE-2020-12069

Device takeover via weak password hashing

Published Dec 26, 2022 · Updated Apr 14, 2025

Weak password hashing in CODESYS V3 before 3.5.16.0 allows local users to gain full control of devices containing CmpUserMgr. The CmpUserMgr component stores online-communication passwords with a hashing algorithm that provides insufficient resistance to password recovery. Low-privileged local access to the runtime's stored credential data is required; recovered passwords permit authenticated control of the device.

CVSS severity7.8
High
EPSS probability0.16%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Weak password hashing in CODESYS V3 before 3.5.16.0 allows local users to gain full control of devices containing CmpUserMgr. The CmpUserMgr component stores online-communication passwords with a hashing algorithm that provides insufficient resistance to password recovery. Low-privileged local access to the runtime's stored credential data is required; recovered passwords permit authenticated control of the device.

The record

CVE
CVE-2020-12069
Published
Dec 26, 2022
Updated
Apr 14, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-916, CAPEC-55, T1110.002
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Dec 26, 2022CVE publishedPublication date reported by the CVE source.
  2. Apr 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

7.8CERTVDECVSS:3.1/AV:L/AC:L/PR:L/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)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-916Use of Password Hash With Insufficient Computational Effort
CAPEC-55Rainbow Table Password Cracking
T1110.002Password Cracking

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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