CVE-2020-37126 | Free Desktop Clock 3.0 contains a stack overflow vulnerabili… | CVSS 9.8 CRITICAL

Description

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.

Metadata

CVE ID: CVE-2020-37126
State: PUBLISHED
Assigner: VulnCheck
Reserved: 2026-02-03 16:27 UTC
Published: 2026-02-05 16:13 UTC
Last updated: 2026-02-05 21:18 UTC
Primary CWE: CWE-121
Stack-based Buffer Overflow
Vendor / Product: Drive Software Company / Free Desktop Clock
Sources: cve.org · NVD

Severity & Metrics

9.8 CRITICAL CVSS 3.1

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

SSVC — CISA Coordinator

Exploitation: PoC
Automatable: yes
Tech. Impact: total

Affected products (1)

Vendor	Product	Platform	Versions
Drive Software Company	Free Desktop Clock	—	3.0

Weakness (CWE)

CWE	Source	Description
CWE-121	cna	Stack-based Buffer Overflow

CVSS scores (2)

Score	Severity	Version	Source	Vector
9.8	CRITICAL	3.1	cna	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
8.4	HIGH	4.0	cna	CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

References (3)

ExploitDB-48314 https://www.exploit-db.com/exploits/48314
Vendor Homepage http://www.drive-software.com
VulnCheck Advisory: Free Desktop Clock x86 Venetian Blinds Zipper 3.0 - Unicode Stack Overflow (SEH) https://www.vulncheck.com/advisories/free-desktop-clock-x-venetian-blinds-zipper-unicode-stack-overflow-seh