What is CVE-2020-37126?

CVE-2020-37126 is a critical-severity vulnerability in Drive Software Company Free Desktop Clock, classified under Stack-based Buffer Overflow. CVSS score: 9.8/10. Published 2026-02-05.

How severe is CVE-2020-37126?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Buffer overflow in Drive Software Company Free Desktop Clock

CVE-2020-37126

Free Desktop Clock 3.0 contains a stack overflow vulnerability in the Time Zones display name input that allows attackers to overwrite Structured Exception Handler (SEH) registers. Attackers can exploit the vulnerability by crafting a malicious Unicode input that triggers an access violation and potentially execute arbitrary code.

Vulnerability class: Buffer Overflow

EPSS: 0.006 (42.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Drive Software Company Free Desktop Clock — versions 3.0

Weakness classification (CWE)

CWE-121 — Stack-based Buffer Overflow

References

disclosure@vulncheck.com (exploit)
disclosure@vulncheck.com (product)
disclosure@vulncheck.com (third-party-advisory)

Frequently asked questions

What is CVE-2020-37126?: CVE-2020-37126 is a critical-severity vulnerability in Drive Software Company Free Desktop Clock, classified under Stack-based Buffer Overflow. CVSS score: 9.8/10. Published 2026-02-05.
How severe is CVE-2020-37126?: Critical severity. CVSS v3 base score is 9.8 out of 10.