What is CVE-2025-54500?

CVE-2025-54500 is a medium-severity vulnerability in F5 Big-Ip, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 5.3/10. Published 2025-08-13.

How severe is CVE-2025-54500?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Is CVE-2025-54500 known to be exploited?

2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Resource exhaustion in F5 Big-Ip

CVE-2025-54500

An HTTP/2 implementation flaw allows a denial-of-service (DoS) that uses malformed HTTP/2 control frames in order to break the max concurrent streams limit (HTTP/2 MadeYouReset Attack). Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

Published 2025-08-13 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L.

EPSS exploit prediction

EPSS: 0.005 (41.8th percentile), scored 2026-10-24.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 42nd percentile — 41.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000

Affected products

Weakness classification (CWE)

CWE-770 — Allocation of Resources Without Limits or Throttling

Public proof-of-concept exploits

References

my.f5.com/manage/s/article/K000152001 (vendor-advisory, Vendor Advisory)
af854a3a-2127-422b-91ae-364da2661108 (Third Party Advisory)

Frequently asked questions

What is CVE-2025-54500?: CVE-2025-54500 is a medium-severity vulnerability in F5 Big-Ip, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 5.3/10. Published 2025-08-13.
How severe is CVE-2025-54500?: Medium severity. CVSS v3 base score is 5.3 out of 10.
Is CVE-2025-54500 known to be exploited?: 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.