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CVE-2020-37121

5.5 · MEDIUM

CODE::BLOCKS 16.01 contains a buffer overflow vulnerability that allows attackers to execute arbitrary code by overwriting Structured Exception Handler with crafted Unicode characters.

Published Feb 5, 2026CWE-121EPSS 0.24%

Overview

CVE-2020-37121 is a medium-severity vulnerability. It was published on February 5, 2026 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 5.5, rated MEDIUM. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

Technical description

CODE::BLOCKS 16.01 contains a buffer overflow vulnerability that allows attackers to execute arbitrary code by overwriting Structured Exception Handler with crafted Unicode characters. Attackers can create a malicious text file with 1982 bytes of buffer and shellcode to trigger remote code execution.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refnutcrackerssecurity.github.io/posts/windows-exploit-dev-part-7/Refsourceforge.net/projects/codeblocks/Refwww.codeblocks.org/Refwww.vulncheck.com/advisories/codeblocks-buffer-overflow-seh-unicode

How CyberStrike helps

Frequently asked questions

What is CVE-2020-37121?

CVE-2020-37121 is a medium-severity vulnerability. It was published on February 5, 2026 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2020-37121?

This vulnerability has a CVSS 3.1 base score of 5.5, rated MEDIUM. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2020-37121?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2020-37121?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2020-37121 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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