CVE-2023-43687Network attack vector

Code execution via unlocked verification-execution race

Published Aug 14, 2025 · Updated Aug 15, 2025

Race condition in Malwarebytes before 4.6.14.326 and before 5.1.5.116 allows remote attackers to execute code via a file-replacement race. The file-processing path verifies a file and later executes it without locking the file against replacement between those operations. Network access with no authentication or user interaction is sufficient; successful exploitation runs attacker-controlled code and can expose or alter endpoint data.

CVSS severity6.5
Medium
EPSS probability0.24%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Race condition in Malwarebytes before 4.6.14.326 and before 5.1.5.116 allows remote attackers to execute code via a file-replacement race. The file-processing path verifies a file and later executes it without locking the file against replacement between those operations. Network access with no authentication or user interaction is sufficient; successful exploitation runs attacker-controlled code and can expose or alter endpoint data.

The record

CVE
CVE-2023-43687
Published
Aug 14, 2025
Updated
Aug 15, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-421
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 14, 2025CVE publishedPublication date reported by the CVE source.
  2. Aug 15, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

6.5CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-421Race Condition During Access to Alternate Channel

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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