CVE-2021-30186
HIGHCVSS 7.5/10EPSS 7.36%
Last modified
CVE-2021-30186 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. CODESYS V2 runtime system SP before 2.4.7.55 has a Heap-based Buffer Overflow.. EPSS estimates a 7.36% chance of exploitation in the next 30 days.
Description
CODESYS V2 runtime system SP before 2.4.7.55 has a Heap-based Buffer Overflow.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Wago | 750-893 Firmware | < fw08 |
| Wago | 750-891 Firmware | < fw08 |
| Wago | 750-890 Firmware | < fw08 |
| Wago | 750-889 Firmware | < fw15 |
| Wago | 750-885 Firmware | < fw15 |
| Wago | 750-882 Firmware | < fw15 |
| Wago | 750-881 Firmware | < fw15 |
| Wago | 750-880 Firmware | < fw16 |
| Wago | 750-862 Firmware | < fw08 |
| Wago | 750-852 Firmware | < fw15 |
| Wago | 750-832 Firmware | < fw08 |
| Wago | 750-831 Firmware | < fw15 |
| Wago | 750-829 Firmware | < fw15 |
| 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_\(18\) |
| Wago | 750-8214 Firmware | < 03.06.19_\(18\) |
| Wago | 750-8216 Firmware | < 03.06.19_\(18\) |
| Wago | 750-8217 Firmware | < 03.06.19_\(18\) |
| Codesys | Plcwinnt | < 2.4.7.55 |
| Codesys | Runtime Toolkit | < 2.4.7.55 |
| Wago | 750-823 Firmware | < fw08 |
References
- https://customers.codesys.com/index.phpPermissions Required, Vendor Advisory
- https://customers.codesys.com/index.phpPermissions Required, Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Analyzed
Frequently Asked Questions
What is CVE-2021-30186?
CODESYS V2 runtime system SP before 2.4.7.55 has a Heap-based Buffer Overflow.
How severe is CVE-2021-30186?
CVE-2021-30186 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 7.36% probability of exploitation in the next 30 days.
How do I fix CVE-2021-30186?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
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Are you affected by CVE-2021-30186?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST