CVE-2020-12069

CODESYS V3 prone to Inadequate Password Hashing

7.8 High

In CODESYS V3 products in all versions prior V3.5.16.0 containing the CmpUserMgr, the CODESYS Control runtime system stores the online communication passwords using a weak hashing algorithm. This can be used by a local attacker with low privileges to gain full control of the device.

Attack profile

How easy it is to exploit

Attack vector: Local
Complexity: Low
Privileges needed: Low
User interaction: None

What an attacker can affect

Confidentiality: High
Integrity: High
Availability: High

Exploit likelihood

0.17%Down 0.7 points since Dec 27, 2022

What each source reports

CVE List Score used 7.8

CODESYS V3 prone to Inadequate Password Hashing

Record: CVE-2020-12069
CVSS 3.1: 7.8 HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness: CWE-916
Updated: 2026-11-02

EUVDEUVD-2020-4385 7.8

Record: EUVD-2020-4385
CVSS 3.1: 7.8 HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Updated: 2026-11-02

GitHub AdvisoriesGHSA-26j2-2wp8-h95h 9.8

In Pilz PMC programming tool 3.x before 3.5.17 (based on CODESYS Development System), the...

In Pilz PMC programming tool 3.x before 3.5.17 (based on CODESYS Development System), the password-hashing feature requires insufficient computational effort.

Record: GHSA-26j2-2wp8-h95h
CVSS 3.1: 9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness: CWE-916
Updated: 2026-11-02

NVD 7.8

Record: CVE-2020-12069
CVSS 3.1: 7.8 HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness: CWE-916
Updated: 2026-11-02

Affected products

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History

History
Recorded	Changed	Sources
Nov 2, 2026	first indexed	CVE List, EUVD, GitHub Advisories, NVD

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2020-12069 is a high vulnerability (CVSS 7.8) in Codesys V3 Containing The Cmpusermgr, published December 26, 2022. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.17%, the 6th percentile. No source names a fixed version.