What’s Vulnerable › Vulnerabilities

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

• Severity: high (CVSS 8.4 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-05-13 · updated 2026-06-17
• Weakness: CWE-121

Description

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.

Affected products

• Drive-software Atomic Alarm Clock: 6.3

References

• https://www.exploit-db.com/exploits/48346
• https://www.vulncheck.com/advisories/atomic-alarm-clock-stack-overflow-via-seh-unicode

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