Buffer overflow in Drive-Software Atomic Alarm Clock
CVE-2020-37221
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.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.4 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.002 (3.7th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 4th percentile — 3.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: 0.000
Affected products
- Drive-Software Atomic Alarm Clock — versions 6.3
Weakness classification (CWE)
References
- www.exploit-db.com/exploits/48346 (exploit)
- www.vulncheck.com/advisories/atomic-alarm-clock-stack-overflow-via-seh-unicode (third-party-advisory)
Frequently asked questions
- What is CVE-2020-37221?
- CVE-2020-37221 is a high-severity vulnerability in Drive-Software Atomic Alarm Clock, classified under Stack-based Buffer Overflow. CVSS score: 8.4/10. Published 2026-05-13.
- How severe is CVE-2020-37221?
- High severity. CVSS v3 base score is 8.4 out of 10.