What’s Vulnerable › Vulnerabilities
CVE-2021-30195
- Severity: high (CVSS 7.5 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 7.6% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2021-05-25 · updated 2026-06-17
- Weakness: CWE-125
Description
CODESYS V2 runtime system before 2.4.7.55 has Improper Input Validation.
Affected products
- CODESYS PLCWinNT: before 2.4.7.55 — fixed in 2.4.7.55
- CODESYS Runtime Toolkit: 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
- WAGO 750-890 Firmware: before fw08 — fixed in fw08
- WAGO 750-891 Firmware: before fw08 — fixed in fw08
- WAGO 750-893 Firmware: before fw08 — fixed in fw08
How to fix
Upgrade to a fixed version: CODESYS PLCWinNT 2.4.7.55; CODESYS Runtime Toolkit 2.4.7.55; WAGO 750-8202 Firmware 03.06.19_\(18\); WAGO 750-8203 Firmware 03.06.19_\(18\); WAGO 750-8204 Firmware 03.06.19_\(18\); WAGO 750-8206 Firmware 03.06.19_\(18\); WAGO 750-8207 Firmware 03.06.19_\(18\); WAGO 750-8208 Firmware 03.06.19_\(18\); WAGO 750-8210 Firmware 03.06.19_\(18\); WAGO 750-8211 Firmware 03.06.19_\(18\); WAGO 750-8212 Firmware 03.06.19_\(18\); WAGO 750-8213 Firmware 03.06.19_\(18\). Check the vendor advisory for mitigations.
References
- https://customers.codesys.com/index.php
- https://customers.codesys.com/index.php?eID=dumpFile&t=f&f=14725&token=08691519ef764b252630759eff925890176ecd78&download=
- https://customers.codesys.com/index.php
- https://customers.codesys.com/index.php?eID=dumpFile&t=f&f=14725&token=08691519ef764b252630759eff925890176ecd78&download=
Get alerted when CVE-2021-30195 or the next vulnerability affects your stack