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Vulnerability record · CVE-2020-37040 · published 30 January 2026

CVE-2020-37040: Classic buffer overflow vulnerability

Code Blocks 17.12 contains a local buffer overflow vulnerability that allows attackers to execute arbitrary code by crafting a malicious file name with Unicode characters. Attackers can trigger the vulnerability by pasting a specially crafted payload into the file name field during project creation, potentially executing system commands like calc.exe.

8.4 CVSS 4.0 High EPSS 0.20% · top 91.2% CWE-120 · Classic buffer overflow Deferred
8.4CVSS 4.0 base score
0.20%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
4References
17 Jun 2026Last modified by NVD

Description

Code Blocks 17.12 contains a local buffer overflow vulnerability that allows attackers to execute arbitrary code by crafting a malicious file name with Unicode characters. Attackers can trigger the vulnerability by pasting a specially crafted payload into the file name field during project creation, potentially executing system commands like calc.exe.

CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

References

LinkTags
http://www.codeblocks.org/
https://sourceforge.net/projects/codeblocks
https://www.exploit-db.com/exploits/48594
https://www.vulncheck.com/advisories/code-blocks-file-name-local-buffer-overflow

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Source: NIST National Vulnerability Database (record CVE-2020-37040), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.