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CVE-2021-47798

CRITICAL
Classic Buffer Overflow (CWE-120)
2026-01-16 disclosure@vulncheck.com
Buffer Overflow Denial Of Service
9.8
CVSS 3.1 · NVD
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Severity by source

NVD PRIMARY
9.8 CRITICAL
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

Lifecycle Timeline

3
Analysis Generated
Mar 12, 2026 - 21:54 vuln.today
PoC Detected
Jan 16, 2026 - 15:55 vuln.today
Public exploit code
CVE Published
Jan 16, 2026 - 00:16 nvd
CRITICAL 9.8

DescriptionCVE.org

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.

AnalysisAI

NoteBurner 2.35 contains a buffer overflow in the license code input field that enables local attackers to crash the application or potentially execute arbitrary code by supplying an oversized activation key.

Technical ContextAI

The license code input field in NoteBurner 2.35 lacks proper bounds checking, allowing a CWE-120 classic buffer overflow when processing activation keys exceeding the expected buffer size.

Affected ProductsAI

NoteBurner 2.35

RemediationAI

Update NoteBurner to the latest version. Avoid using license keys from untrusted sources.

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CVE-2021-47798 vulnerability details – vuln.today
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