CVE-2020-37221

HighPublic PoC

Published: 13 May 2026

Published

13 May 2026

Modified

13 May 2026

KEV Added

—

Patch

—

CVSS Score v4 8.6 CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/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:X/V:X/RE:X/U:X

EPSS Score 0.0015 4.8th percentile

Risk Priority 55 floored blend · peak EPSS

Summary

CVE-2020-37221 is a high-severity Stack-based Buffer Overflow (CWE-121) vulnerability. Its CVSS base score is 8.6 (High).

Operationally, ranked at the 4.8th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.

EU & UK References

🇪🇺 ENISA EUVD: EUVD-2020-31222

Vulnerability details

Atomic Alarm Clock 6.3 contains a stack overflow vulnerability that allows local attackers to execute arbitrary code by supplying a malicious string to the display name textbox in the Time Zones Clock configuration. Attackers can craft a buffer with structured…

exception handling overwrite and encoded shellcode to bypass SafeSEH protections and execute arbitrary commands with application privileges.