What is the CVSS score of CVE-2023-43683?

CVE-2023-43683 has a CVSS 3.1 base score of 6.5 (Medium). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L. EPSS exploitation probability: 0.1%.

Which versions of Malwarebytes are affected by CVE-2023-43683?

Organizations using Malwarebytes 4.6.14.326 and should be aware of notable risk from CVE-2023-43683, a stack-based buffer overflow vulnerability rated CVSS 6.5.

How to fix or mitigate CVE-2023-43683?

Within 30 days: Identify affected systems running Malwarebytes 4.6.14.326 and and apply vendor patches as part of regular patch cycle. Monitor vendor channels for patch availability.

Malwarebytes CVE-2023-43683

MEDIUM

Stack-based Buffer Overflow (CWE-121)

2025-08-14 cve@mitre.org

Buffer Overflow Stack Overflow

6.5

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

6.5 MEDIUM

AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L

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:L/I:N/A:L

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

Low

Lifecycle Timeline

Analysis Generated

Mar 28, 2026 - 19:06 vuln.today

CVE Published

Aug 14, 2025 - 17:15 nvd

MEDIUM 6.5

DescriptionCVE.org

An issue was discovered in Malwarebytes 4.6.14.326 and before 5.1.5.116 (and Nebula 2020-10-21 and later). A Stack buffer out-of-bounds access exists because of an integer underflow when handling newline characters.

AnalysisAI

An issue was discovered in Malwarebytes 4.6.14.326 and before 5.1.5.116 (and Nebula 2020-10-21 and later). Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

Technical ContextAI

This vulnerability is classified under CWE-121. An issue was discovered in Malwarebytes 4.6.14.326 and before 5.1.5.116 (and Nebula 2020-10-21 and later). A Stack buffer out-of-bounds access exists because of an integer underflow when handling newline characters. Version information: before 5.1.5.116.

Affected ProductsAI

Malwarebytes 4.6.14.326 and.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.