How severe is CVE-2023-43683?

CVE-2023-43683 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability low.

Is CVE-2023-43683 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (24th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2023-43683?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2023-43683 have an EU (EUVD) identifier?

Yes. CVE-2023-43683 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2023-48064.

When was CVE-2023-43683 published?

CVE-2023-43683 was published on 2025-08-14 and last updated on 2026-06-17.

CVE-2023-43683

CVE-2023-43683 is a medium-severity vulnerability with a CVSS 3.x base score of 6.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-121.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
EPSS exploit prediction: 0% (24th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2023-48064
Weakness: CWE-121
Published: 2025-08-14
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is CVE-2023-43683?: 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.
How severe is CVE-2023-43683?: CVE-2023-43683 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability low.
Is CVE-2023-43683 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (24th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2023-43683?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2023-43683 have an EU (EUVD) identifier?: Yes. CVE-2023-43683 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2023-48064.
When was CVE-2023-43683 published?: CVE-2023-43683 was published on 2025-08-14 and last updated on 2026-06-17.

References

https://www.malwarebytes.com/secure/cves/cve-2023-43683

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