CVE-2020-37126CWE-121

Free Desktop Clock x86 Venetian Blinds Zipper 3.0 - Unicode Stack Overflow (SEH)

High · published February 5, 2026

CVSS v4.0
8.4
EPSS
1%
Percentile
49.0
In the wild
Unconfirmed
What it is

⚡ A seemingly innocent input field is all it takes for chaos! The stack overflow vulnerability in Free Desktop Clock 3.0 lets attackers hijack control with a crafty Unicode string. 🔥 Think of it like a ticking time bomb disguised as a regular clock. By slipping in a faulty clock hand (the malicious input), an attacker can cause the whole mechanism to malfunction, leading to unexpected behavior or even a catastrophic failure! This vulnerability could lead to attackers executing arbitrary code on your system, potentially compromising sensitive data or taking complete control. It's like giving a thief the key to your entire house, allowing them to roam freely and cause havoc!

Put simply

Think of it like a ticking time bomb disguised as a regular clock. By slipping in a faulty clock hand (the malicious input), an attacker can cause the whole mechanism to malfunction, leading to unexpected behavior or even a catastrophic failure! In Free Desktop Clock 3.0, a stack overflow occurs in the Time Zones display name input, allowing crafted Unicode strings to overwrite Structured Exception Handler (SEH) registers, resulting in access violations and arbitrary code execution.

What to do

This vulnerability could lead to attackers executing arbitrary code on your system, potentially compromising sensitive data or taking complete control. It's like giving a thief the key to your entire house, allowing them to roam freely and cause havoc! To protect yourself, update to the latest version of Free Desktop Clock as soon as possible. Additionally, consider implementing input validation to filter out potentially harmful Unicode inputs. Regularly review your software for any vulnerabilities and keep it patched! You've got this! By following these steps, you’re taking charge of your security and keeping your systems safe! 🛡️

The record
Technical detail
CVSS v4.0
8.4 · HIGH
Vector
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
EPSS
0.00620 · 49.0th percentile
Weakness
CWE-121 · Stack-based Buffer Overflow
Published
2026-02-05T16:13Z
EPSS history
Timeline
  • 05 FEB 16:13Z
    Free Desktop Clock x86 Venetian Blinds Zipper 3.0 - Unicode Stack Overflow (SEH)
    cvelistv5