Medium 5.5Published Feb 5, 2026

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

Updated under an hour ago (Oct 26, 2026, 3:00 PM ET)

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No exploitation reported and no EPSS estimate yet.

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Exploited in the last 30 days

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.

CVSS: 5.5 MEDIUM (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Weakness (CWE): CWE-121
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: VulnCheck
NVD analysis: Deferred
Record last updated: Aug 6, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Code::Blocks Code::Blocks code_blocks:code_blocks (from the name)	16.01	CNA record

References

References

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

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.