CVE-2020-37121

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.

Score

CVSS 4.0 6.7 Medium

Status

Deferred - disclosure@vulncheck.com

Published

2026-02-05

Last modified

2026-08-06

Weaknesses

CWE-121

Affected products

• Code\ (Codeblocks)

References

• https://nutcrackerssecurity.github.io/posts/windows-exploit-dev-part-7/
• https://sourceforge.net/projects/codeblocks/
• https://www.codeblocks.org/
• https://www.vulncheck.com/advisories/codeblocks-buffer-overflow-seh-unicode