CVE-2021-30188: Codesys v2 Runtime System SP

Critical severity, CVSS 9.8. EPSS: 1.3% chance of exploitation in the next 30 days.

CODESYS V2 runtime system SP before 2.4.7.55 has a Stack-based Buffer Overflow.

Affected products

• Codesys v2 Runtime System SP: before 2.4.7.55 (fixed in 2.4.7.55)
• Wago 750-8202 Firmware: before 03.06.19_\(18\) (fixed in 03.06.19_\(18\))
• Wago 750-8203 Firmware: before 03.06.19_\(18\) (fixed in 03.06.19_\(18\))
• Wago 750-8204 Firmware: before 03.06.19_\(18\) (fixed in 03.06.19_\(18\))
• Wago 750-8206 Firmware: before 03.06.19_\(18\) (fixed in 03.06.19_\(18\))
• Wago 750-8207 Firmware: before 03.06.19_\(18\) (fixed in 03.06.19_\(18\))
• Wago 750-8208 Firmware: before 03.06.19_\(18\) (fixed in 03.06.19_\(18\))
• Wago 750-8210 Firmware: before 03.06.19_\(18\) (fixed in 03.06.19_\(18\))
• Wago 750-8211 Firmware: before 03.06.19_\(18\) (fixed in 03.06.19_\(18\))
• Wago 750-8212 Firmware: before 03.06.19_\(18\) (fixed in 03.06.19_\(18\))
• Wago 750-8213 Firmware: before 03.06.19_\(18\) (fixed in 03.06.19_\(18\))
• Wago 750-8214 Firmware: before 03.06.19_\(18\) (fixed in 03.06.19_\(18\))
• Wago 750-8216 Firmware: before 03.06.19_\(18\) (fixed in 03.06.19_\(18\))
• Wago 750-8217 Firmware: before 03.06.19_\(18\) (fixed in 03.06.19_\(18\))
• Wago 750-823 Firmware: before fw08 (fixed in fw08)
• Wago 750-829 Firmware: before fw15 (fixed in fw15)
• Wago 750-831 Firmware: before fw15 (fixed in fw15)
• Wago 750-832 Firmware: before fw08 (fixed in fw08)
• Wago 750-852 Firmware: before fw15 (fixed in fw15)
• Wago 750-862 Firmware: before fw08 (fixed in fw08)
• Wago 750-880 Firmware: before fw16 (fixed in fw16)
• Wago 750-881 Firmware: before fw15 (fixed in fw15)
• Wago 750-882 Firmware: before fw15 (fixed in fw15)
• Wago 750-885 Firmware: before fw15 (fixed in fw15)
• Wago 750-889 Firmware: before fw15 (fixed in fw15)
• and 3 more

Published 2021-05-25. Last modified 2026-06-17.