CVE-2021-47775

HIGH

YouTube Downloader 1.9.9.1 - Buffer Overflow

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2021-47775. PoCs published by stresser.

AI-analyzed exploit summary This exploit targets a buffer overflow vulnerability in YouTube Video Grabber 1.9.9.1 via SEH overwrite, delivering a bind shell payload. It generates a malicious file to trigger the vulnerability when pasted into the application's input field.

Description

YouTube Video Grabber, now referred to as YouTube Downloader, 1.9.9.1 contains a buffer overflow vulnerability that allows attackers to execute arbitrary code by overwriting the Structured Exception Handler. Attackers can craft a malicious payload of 712 bytes with SEH manipulation to trigger a bind shell connection on a specified local port.

Exploits (1)

exploitdb WORKING POC
by stresser · pythonlocalwindows
https://www.exploit-db.com/exploits/50471

This exploit targets a buffer overflow vulnerability in YouTube Video Grabber 1.9.9.1 via SEH overwrite, delivering a bind shell payload. It generates a malicious file to trigger the vulnerability when pasted into the application's input field.

Classification
Working Poc 95%
Attack Type
Rce
Complexity
Moderate
Reliability
Reliable
Target: YouTube Video Grabber 1.9.9.1
No auth needed
Prerequisites: Victim must open the generated Evil.txt file and paste its contents into the vulnerable application
devstral-2 · analyzed Feb 16, 2026 Full analysis →

References (2)

Core 2
Core References
Exploit, Third Party Advisory exploit
https://www.exploit-db.com/exploits/50471

Scores

CVSS v3 8.4
EPSS 0.0015
EPSS Percentile 4.4%
Attack Vector LOCAL
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CISA SSVC

Vulnrichment
Exploitation poc
Automatable no
Technical Impact total

Details

CWE
CWE-787
Status published
Published Jan 15, 2026
Tracked Since Feb 18, 2026