What is CVE-2023-43688?

CVE-2023-43688 is a high-severity vulnerability, classified under Heap-based Buffer Overflow. CVSS score: 7.5/10. Published 2026-06-09.

How severe is CVE-2023-43688?

High severity. CVSS v3 base score is 7.5 out of 10.

CVE-2023-43688

CVE-2023-43688

An issue was discovered in Malwarebytes 4.x and 5.x (and Nebula 2020-10-21 and later). There is a Heap buffer overflow in various buffer encryption utilities.

Vulnerability class: Buffer Overflow

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Weakness classification (CWE)

CWE-122 — Heap-based Buffer Overflow

References

cve@mitre.org

Frequently asked questions

What is CVE-2023-43688?: CVE-2023-43688 is a high-severity vulnerability, classified under Heap-based Buffer Overflow. CVSS score: 7.5/10. Published 2026-06-09.
How severe is CVE-2023-43688?: High severity. CVSS v3 base score is 7.5 out of 10.