CVE-2021-47775CWE-787

YouTube Video Grabber 1.9.9.1 - Buffer Overflow (SEH)

High · published January 15, 2026

CVSS v4.0
8.4
EPSS
0%
Percentile
6.3
In the wild
Unconfirmed
What it is

⚡ A sneaky buffer overflow in YouTube Downloader 1.9.9.1 could allow attackers to hijack your system with just 712 bytes of malicious code! 🚨 Think of it like a delivery driver who slips a fake package into your mailbox, and suddenly your whole home network is open to intruders—completely unexpected and incredibly dangerous! With this vulnerability, an attacker could execute arbitrary code and establish a bind shell on your machine, potentially giving them full control over your system. This means they could steal sensitive information, manipulate files, or even use your device as a base for further attacks. Yikes!

Put simply

Think of it like a delivery driver who slips a fake package into your mailbox, and suddenly your whole home network is open to intruders—completely unexpected and incredibly dangerous! This buffer overflow vulnerability allows an attacker to overwrite the Structured Exception Handler (SEH), enabling malicious payload execution and leading to unauthorized control of the affected system.

What to do

With this vulnerability, an attacker could execute arbitrary code and establish a bind shell on your machine, potentially giving them full control over your system. This means they could steal sensitive information, manipulate files, or even use your device as a base for further attacks. Yikes! To protect yourself, update YouTube Downloader to version 1.9.9.2 or later immediately. Additionally, consider implementing stricter controls on input data and monitor network traffic for unexpected connections. Don't wait too long! You've got this! Tackle this vulnerability head-on and keep your system secure! 🛡️

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
0.00172 · 6.3th percentile
Weakness
CWE-787 · Out-of-bounds Write
Published
2026-01-15T15:52Z
EPSS history
Timeline
  • 15 JAN 15:52Z
    YouTube Video Grabber 1.9.9.1 - Buffer Overflow (SEH)
    cvelistv5