CVE-2021-29241
HIGHCVSS 7.5/10EPSS 1.42%
Last modified
CVE-2021-29241 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. CODESYS Gateway 3 before 3.5.16.70 has a NULL pointer dereference that may result in a denial of service (DoS).. EPSS estimates a 1.42% chance of exploitation in the next 30 days.
Description
CODESYS Gateway 3 before 3.5.16.70 has a NULL pointer dereference that may result in a denial of service (DoS).
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 |
|---|---|---|
| Codesys | Control For Beaglebone Sl | >= 3.0, < 4.0.1.0 |
| Codesys | Control For Empc-A\/Imx6 Sl | >= 3.0, < 4.0.1.0 |
| Codesys | Control For Iot2000 Sl | >= 3.0, < 4.0.1.0 |
| Codesys | Control For Linux Sl | >= 3.0, < 4.0.1.0 |
| Codesys | Control For Pfc100 Sl | >= 3.0, < 3.5.16.0 |
| Codesys | Control For Pfc200 Sl | >= 3.0, < 3.5.16.0 |
| Codesys | Control For Raspberry Pi Sl | >= 3.0, < 4.0.1.0 |
| Codesys | Control Runtime System Toolkit | >= 3.0, < 3.5.16.70 |
| Codesys | Development System | >= 3.0, < 3.5.16.70 |
| Codesys | Edge Gateway | >= 3.0, < 3.5.16.70 |
| Codesys | Edge Gateway | >= 3.0, < 4.1.0.0 |
| Codesys | Gateway | >= 3.0, < 3.5.16.70 |
References
- https://customers.codesys.com/index.phpPermissions Required, Vendor Advisory
- https://www.codesys.com/security/security-reports.htmlVendor Advisory
- https://customers.codesys.com/index.phpPermissions Required, Vendor Advisory
- https://www.codesys.com/security/security-reports.htmlVendor Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2021-29241?
CODESYS Gateway 3 before 3.5.16.70 has a NULL pointer dereference that may result in a denial of service (DoS).
How severe is CVE-2021-29241?
CVE-2021-29241 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 1.42% probability of exploitation in the next 30 days.
How do I fix CVE-2021-29241?
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-2021-29241?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST