CVE-2021-47798

CRITICAL

NoteBurner 2.35 - Denial of Service via License Code Input Buffer Overflow

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2021-47798. PoCs published by stresser.

AI-analyzed exploit summary This exploit generates a large buffer of 'A' characters to trigger a denial-of-service (DoS) in NoteBurner 2.35 by overflowing the 'Name' and 'Code' fields in the license input form. The PoC creates a file (Evil.txt) containing the payload, which is then pasted into the application to cause a crash.

Description

NoteBurner 2.35 contains a buffer overflow vulnerability in the license code input field that allows attackers to crash the application. Attackers can generate a 6000-byte payload and paste it into the 'Name' and 'Code' fields to trigger an application crash.

Exploits (1)

exploitdb WORKING POC
by stresser · pythonwebappswindows
https://www.exploit-db.com/exploits/50154

This exploit generates a large buffer of 'A' characters to trigger a denial-of-service (DoS) in NoteBurner 2.35 by overflowing the 'Name' and 'Code' fields in the license input form. The PoC creates a file (Evil.txt) containing the payload, which is then pasted into the application to cause a crash.

Classification
Working Poc 90%
Attack Type
Dos
Complexity
Trivial
Reliability
Reliable
Target: NoteBurner 2.35
No auth needed
Prerequisites: Python to generate the payload · NoteBurner 2.35 installed on Windows · User interaction to paste the payload
devstral-2 · analyzed Feb 16, 2026 Full analysis →

References (3)

Core 3
Core References
Exploit, Third Party Advisory exploit
https://www.exploit-db.com/exploits/50154
Various Sources product
https://www.noteburner.com/

Scores

CVSS v3 9.8
EPSS 0.0039
EPSS Percentile 30.7%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CISA SSVC

Vulnrichment
Exploitation poc
Automatable yes
Technical Impact total

Details

CWE
CWE-120
Status published
Published Jan 16, 2026
Tracked Since Feb 18, 2026