CVE-2021-23047

5.3 mediumEPSS 0.6%

Medium (5.3) in f5 big-ip access policy manager. EPSS 0.6% chance of exploitation in the next 30 days.

On version 16.x before 16.1.0, 15.1.x before 15.1.3.1, 14.1.x before 14.1.4.3, and all versions of 13.1.x, 12.1.x and 11.6.x, when BIG-IP APM performs Online Certificate Status Protocol (OCSP) verification of a certificate that contains Authority Information Access (AIA), undisclosed requests may cause an increase in memory use. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

Severity

CVSS 3.1

5.3 medium

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

EPSS: 0.6% chance of exploitation in the next 30 days; higher than 48% of CVEs (scores of 2026-10-31)
CWE: CWE-400
Published: 2021-09-14
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

f5:big-ip_access_policy_manager

References

https://support.f5.com/csp/article/K79428827
https://support.f5.com/csp/article/K79428827

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