CVE-2020-37221 HIGH

CVE-2020-37221: Atomic Alarm Clock 6.3 Stack Overflow via SEH Unicode

Vendor Drive-Software
Product Atomic Alarm Clock
Weakness CWE-121
Published May 13, 2026
Last update May 13, 2026

CVSS base score

8.6/10
Attack vector Local
Attack complexity Low
Privileges required None
User interaction None
Confidentiality
Integrity

CVSS vector

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

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

May 13, 2026 CVE published
May 13, 2026 Record updated