CVE-2021-47798 | NoteBurner 2.35 contains a buffer overflow vulnerability in … | CVSS 9.8 CRITICAL

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.

Metadata

CVE ID: CVE-2021-47798
State: PUBLISHED
Assigner: VulnCheck
Reserved: 2026-01-14 14:39 UTC
Published: 2026-01-15 23:25 UTC
Last updated: 2026-01-16 15:58 UTC
Primary CWE: CWE-120
Buffer Copy without Checking Size of Input ('Classic Buffer …
Vendor / Product: Noteburner / NoteBurner
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
Noteburner	NoteBurner	—	2.35

Weakness (CWE)

CWE	Source	Description
CWE-120	cna	Buffer Copy without Checking Size of Input ('Classic 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
6.7	MEDIUM	4.0	cna	CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

References (3)

ExploitDB-50154 https://www.exploit-db.com/exploits/50154
Official Product Homepage https://www.noteburner.com/
VulnCheck Advisory: NoteBurner 2.35 - Denial Of Service (DoS) (PoC) https://www.vulncheck.com/advisories/noteburner-denial-of-service-dos-poc