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High [CVE-2021-23023] BIG-IP: On version 7.2.1.x before 7.2.1.3 and 7.1.x before 7.1.9.9 Update 1, a DLL hijacking issue exists in cachecleaner.dll included…

This high-severity F5 advisory covers CVE-2021-23023 affecting BIG-IP.

CVE-2021-23023 Published Jun 10, 2021Updated by vendor Jun 17, 2026
Related products & platforms
F5BIG-IP
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Summary

On version 7.2.1.x before 7.2.1.3 and 7.1.x before 7.1.9.9 Update 1, a DLL hijacking issue exists in cachecleaner.dll included in the BIG-IP Edge Client Windows Installer. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

Affected versions
  • 7.2.1.x
  • 7.1.x

Official advisory · high-confidence parse· fetched 2 months ago·verify at source

Fixed versions
  • 7.2.1.3
  • 7.1.9.9

Official advisory · high-confidence parse· fetched 2 months ago·verify at source

Mitigation

Upgrade to a fixed release: 7.2.1.3, 7.1.9.9. That is the remediation for this advisory.

The vendor advisory may list additional interim mitigations or workarounds not captured here — review it before change work.

Official advisory · high-confidence parse· fetched 2 months ago·verify at source

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