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.

CVSS v4.0

6.7 MEDIUMCVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/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:X/V:X/RE:X/U:X

CVSS v3.1

5.5 MEDIUMCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

EPSS

0.20% chance of exploitation in the next 30 days, 10th percentile

Published

2026-02-05

Updated

2026-08-06

Proof-of-concept exploits (1)

• https://nutcrackerssecurity.github.io/posts/windows-exploit-dev-part-7/

References

• CVE Record
• NVD entry

Related

• CVE-2020-37120
• CVE-2020-37122
• CVE-2020-37119
• CVE-2020-37123
• CVE-2020-37118
• CVE-2020-37124