Description
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.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| CODESYS | CODESYS V3 containing the CmpUserMgr | V3 – < V3.5.16.0 | V3.5.16.0 |
Advisories 8
- ICSA-26-076-01 CODESYS in Festo Automation Suite CISA ICS & IT advisories · Mar 17, 2026
- FSA-202601 Several CODESYS vulnerabilities in Festo Automation Suite CERT@VDE · Feb 26, 2026
- ICSA-25-273-04 Festo Controller CECC-S,-LK,-D Family Firmware (Update A) CISA ICS & IT advisories · Nov 13, 2025
- FSA-202202 Festo: Controller CECC-S,LK,D family <= 2.3.8.1 - multiple vulnerabilities in CODESYS V3 runtime system CERT@VDE · Nov 3, 2025
- FSA-202203 Festo: Controller CECC-S,LK,D family firmware 2.4.2.0 - multiple vulnerabilities in CODESYS V3 runtime system CERT@VDE · Jul 10, 2025
- VDE-2022-031 WAGO: Multiple Products Series affected by multiple CODESYS vulnerabilities CERT@VDE · Aug 17, 2022
- VDE-2021-061 Pilz: PMC programming tool 3.x.x affected by multiple vulnerabilities CERT@VDE · Apr 26, 2022
- VDE-2021-054 Pilz: Multiple vulnerabilities in CODESYS V2 and V3 runtime system CERT@VDE · Apr 26, 2022
References
- https://customers.codesys.com/index.php?eID=dumpFile&t=f&f=12943&token=d097958a67ba382de688916f77e3013c0802fade&download= vendor-advisory
- https://cert.vde.com/en/advisories/VDE-2021-061/ vendor-advisory
- https://cert.vde.com/en/advisories/VDE-2022-031/ vendor-advisory
- https://cert.vde.com/en/advisories/VDE-2022-022/ vendor-advisory