What’s Vulnerable › Vulnerabilities

CVE-2020-37121: CODE::BLOCKS 16.01 - Buffer Overflow (SEH) UNICODE

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-02-05 · updated 2026-08-06
• Weakness: CWE-121

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.

Affected products

• Code::Blocks: 16.01

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

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