CVE-2020-6081

mediumpriority · track · 36OT risk · elevatedEPSS 0.018 · 78 %ileDEEUUS
grimoire priorityP3 · Track
Exploitable?
—
no known exploitation
Likely / severe?
1.76% (78th) EPSS
CVSS 6.5 · medium
Is it mine?
19 products
Check your exposure
Who says so?
5 sources
cnnvd · enisa_euvd · nvd · pilz_psirt

EPSS · scored 2026-10-23

An exploitable code execution vulnerability exists in the PLC_Task functionality of 3S-Smart Software Solutions GmbH CODESYS Runtime 3.5.14.30. A specially crafted network request can cause remote code execution. An attacker can send a malicious packet to trigger this vulnerability.

01

remediations

Vendor fix, mitigation, or workaround guidance, as published by each source.

A vendor fix is available.

  • Fixedpilz_psirt

    PMI 6 primo, PMCprimo C: No product-specific countermeasures available, please follow the general countermeasures. • PMCprimo C2, PMCprimo MC: Installation of Firmware Version 03.08.00 This update does not resolve the vulnerabilities (CVE-2021-34595, CVE-2021-34596, CVE-2021-34593, CVE-2021-30186, CVE-2021-30188, CVE-2021-30195, CVE-2019-19789) in the CODESYS V2 runtime system. The V2 runtime system is still included for compatibility reasons but is no longer supported by Pilz. Please migrate your application to the V3 runtime system or follow the general countermeasures.

  • FixedPMC programming tool 3.x.xpilz_psirt

    Installation of the software version 3.5.17

  • MitigationPMC programming tool 3.x.xpilz_psirt

    Use a hardware firewall, host-based firewall or comparable measures at network level toprotect against unauthorised network communication with the PC. Use a virus scanner or other measures to protect against malware. Only use CODESYS libraries and archives from trusted sources.

  • Mitigationwago_psirt

    • We recommend all effected users of the PFC 100 & PFC 200 product family to update to firmware version 03.10.08(22) or later. • We recommend all effected users of the TP600 and CC100 product family to update to firmware version 03.10.09(22) or later. • The affected products of the CC100 family will receive a patched Version approximately in 09/22. In addition to the mitigation hints concerning the above-mentioned vulnerabilities CODESYS GmbH recommends the following general defense measures to reduce the risk of exploits: - Use controllers and devices only in a protected environment to minimize network exposure and ensure that they are not accessible from outside - Use firewalls to protect and separate the control system network from other networks - Use VPN (Virtual Private Networks) tunnels if remote access is required - Activate and apply user management and password features - Use encrypted communication links - Limit the access to both development and control system by physical means, operating system features, etc. - Protect both development and control system by using up to date virus detecting solutions For further impact information and risk mitigation, please refer to the official CODESYS Advisory Website at https://www.codesys.com/security/security-reports.html

02

cvss

Technical severity, 0–10. One row per scoring source.

9.9
010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–critical · 6.5–9.9

v2.06.5mediumAV:N/AC:L/Au:S/C:P/I:P/A:Pprimary · NVD / NIST USexploitability 8 · impact 6.4
v3.18.8highCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:Hprimary · NVD / NIST USexploitability 2.8 · impact 5.9
v3.09.9criticalCVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:Hsecondary · ENISA EU
v3.09.9criticalCVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:Hsecondary · talos-cna@cisco.com USexploitability 3.1 · impact 6
v3.18.8highCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:Hsecondary · WAGO PSIRT DE
v3.18.8highCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:Hsecondary · Pilz PSIRT DE
v3.18.1highCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:Usecondary · CVSS-BT (t0sche)
03

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-345USprimaryCWE-345USCWE-345US
04

affected products (19)

Products and version ranges known to be affected.

05

advisories (3)

Vendor and ecosystem advisories describing this.

  • VDE-2021-054Pilz: Multiple vulnerabilities in CODESYS V2 and V3 runtime system2022-04-26csaf · pilz_psirtDE

    Several Pilz products use Versions V2 and V3 of the CODESYS runtime system from CODESYS GmbH, which enables the execution of IEC 61131-3 PLC programs. These runtime environments contain several vulnerabilities, which an attacker can exploit via the network. Successful exploitation of the vulnerabilities results in reduced availability and, in a worst case, to the insertion of program code.

  • VDE-2021-061Pilz: PMC programming tool 3.x.x affected by multiple vulnerabilities2022-04-26csaf · pilz_psirtDE

    The software product PMC programming tool from Pilz is based on the software CODESYS Development System from CODESYS GmbH. This software is affected by several vulnerabilities, which an attacker can exploit locally or via the network. This means that, in a worst case, attackers could execute arbitrary program code on the PC on which the PMC programming tool is used.

  • VDE-2022-035WAGO: Multiple product series affected by multiple CODESYS vulnerabilities2022-08-17csaf · wago_psirtDE

    Multiple WAGO product families are prone to multiple vulnerabilities affecting CODESYS control runtime system.

06

also known as (3)

Other names and identifiers for this entity.

07

sources

Which sources assert this record, and when.

cnnvdenisa_euvdnvdpilz_psirtwago_psirtNVDCVE.orgMITRE
published 2020-05-07modified 2026-06-17
09

references (5)

External citations — patches, advisories, analysis.

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