Atomic Alarm Clock 6.3 Stack Overflow via SEH Unicode
Key facts
- Attack vector
- Local
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- Code execution
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- No fix listed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-121 and the CVSS impact.
Summary
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.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- No
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Drive Software Company | Atomic Alarm Clock | 6.3 | — | No fix listed | CNA |
- Atomic Alarm Clock VendorDrive Software Company Affected 6.3 Fixed in — No fix listed CNA
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2020-37221
- 2026-10-03 Alias added: GHSA-q8c2-hv55-wmr4
References
Exploit 1
More Drive Software Company vulnerabilities
- TI-2020-19261 Free Desktop Clock x86 Venetian Blinds Zipper 3.0 - Unicode Stack Overflow (SEH) CVSS 4.0HIGH 8.4
- TI-2020-19195 Atomic Alarm Clock x86 6.3 - 'AtomicAlarmClock' Unquoted Service Path CVSS 4.0HIGH 8.5
Sources
- CVE-2020-37221 · CVE Program
- CVE-2020-37221 · NVD
- FIRST EPSS
- GHSA-q8c2-hv55-wmr4 · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences