No exploitation reportedFix available

CVE-2022-31806

Q: Is CVE-2022-31806 actively exploited?

Active exploitation of CVE-2022-31806 has not been confirmed. Its EPSS score was 1.2% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

Q: What is the CVSS score for CVE-2022-31806?

CVE-2022-31806 has a CVSS v3 base score of 9.8 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

No exploitation reported by the sources we read.

Published2022-06-24
Fixed in2.4.7.57
WeaknessCWE-1188

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

In CODESYS V2 PLCWinNT and Runtime Toolkit 32 in versions prior to V2.4.7.57 password protection is not enabled by default and there is no information or prompt to enable password protection at login in case no password is set at the controller.

Timeline

dates in UTC

2022-06-2408:15CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-23 21:37 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2022-31806?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2022-31806?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD

Codesys plcwinnt

Branch	Affected	Fixed in	Source
2.4	< 2.4.7.57	2.4.7.57	NVD

Codesys runtime toolkit

Branch	Affected	Fixed in	Source
2.4	< 2.4.7.57	2.4.7.57	NVD

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Vendor advisories

ICSA-25-329-05 CISA33 known affected
Festo Compact Vision System, Control Block, Controller, and Operator Unit products
Festo Festo Software Compact Vision System SBO-Q-: vers:all/* · Festo -Q-: -Q- · Festo Festo Software Control block CPX-CEC-C1 Codesys V2: vers:all/* · +30 more

Full record on NVD

Fix

Update Codesys plcwinnt to 2.4.7.57
Mitigation from the vendor CISA ICSA-25-329-05 · 33 productsFesto has identified the following specific workarounds and mitigations users can apply to reduce risk:
Mitigation from the vendor CISA ICSA-25-329-05 · 33 productsFor CVE-2022-31806: Enable password protection at login in case no password is set at the controller. Please note that the password configuration file is not covered via default FFT backup & Restore mechanism, you must select the related file manually.
Mitigation from the vendor CISA ICSA-25-329-05 · 33 productsFor more information see the associated Festo SE & Co. KG security advisory FSA-202208 FSA-202208: Festo: Multiple Festo products contain an unsafe default Codesys configuration - HTML, FSA-202208: Festo: Multiple Festo products contain an unsafe default Codesys configuration - CSAF.

Detection

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: none listed

Sources

CNACVSS 3.19.8read 2026-10-23
NVDCVSS 2.06.8read 2026-10-23
CNAweakness (CWE)CWE-1188read 2026-10-23
FIRST EPSSEPSS score1.2 %2026-10-22

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published: 2022-06-24
Last Modified: 2026-06-17
NVD status: Modified

Frequently asked questions

What is CVE-2022-31806?

Is CVE-2022-31806 actively exploited?

Active exploitation of CVE-2022-31806 has not been confirmed. Its EPSS score was 1.2% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2022-31806?

CVE-2022-31806 has a CVSS v3 base score of 9.8 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

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