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Fencer Vulns
medium 5.3

CVE-2025-54500 json

HTTP/2 Vulnerability

published 2025-08-13 14 mo ago modified 2026-06-17 4 mo ago also EUVD-2025-24575

cvss
5.3
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.5%
EPSS 0.5% chance of exploitation in 30 days, percentile 42%
public exploits
0
none known

Summary

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.

Patch / fix

  • f5 big-ip_access_policy_manager 15.1.10.8, 16.1.6.1, 17.1.3, 17.5.1.2
  • f5 big-ip_advanced_firewall_manager 15.1.10.8, 16.1.6.1, 17.1.3, 17.5.1.2
  • f5 big-ip_advanced_web_application_firewall 15.1.10.8, 16.1.6.1, 17.1.3, 17.5.1.2
  • f5 big-ip_analytics 15.1.10.8, 16.1.6.1, 17.1.3, 17.5.1.2
  • f5 big-ip_application_acceleration_manager 15.1.10.8, 16.1.6.1, 17.1.3, 17.5.1.2
  • f5 big-ip_application_security_manager 15.1.10.8, 16.1.6.1, 17.1.3, 17.5.1.2
  • f5 big-ip_application_visibility_and_reporting 15.1.10.8, 16.1.6.1, 17.1.3, 17.5.1.2
  • f5 big-ip_automation_toolchain 15.1.10.8, 16.1.6.1, 17.1.3, 17.5.1.2
  • f5 big-ip_carrier-grade_nat 15.1.10.8, 16.1.6.1, 17.1.3, 17.5.1.2
  • f5 big-ip_container_ingress_services 15.1.10.8, 16.1.6.1, 17.1.3, 17.5.1.2
  • f5 big-ip_ddos_hybrid_defender 15.1.10.8, 16.1.6.1, 17.1.3, 17.5.1.2
  • f5 big-ip_domain_name_system 15.1.10.8, 16.1.6.1, 17.1.3, 17.5.1.2
  • f5 big-ip_edge_gateway 15.1.10.8, 16.1.6.1, 17.1.3, 17.5.1.2
  • f5 big-ip_fraud_protection_service 15.1.10.8, 16.1.6.1, 17.1.3, 17.5.1.2
  • f5 big-ip_global_traffic_manager 15.1.10.8, 16.1.6.1, 17.1.3
  • f5 big-ip_link_controller 15.1.1.0.8, 16.1.6.1, 17.1.3, 17.5.1.2
  • f5 big-ip_local_traffic_manager 15.1.10.8, 16.1.6.1, 17.1.3, 17.5.1.2
  • f5 big-ip_policy_enforcement_manager 15.1.10.8, 16.1.6.1, 17.1.3, 17.5.1.2
  • f5 big-ip_ssl_orchestrator 15.1.10.8, 16.1.6.1, 17.1.3, 17.5.1.2
  • f5 big-ip_webaccelerator 15.1.10.8, 16.1.6.1, 17.1.3, 17.5.1.2

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2025-54500 updated cvss 7.5

nginx: HTTP/2 Vulnerability

  • Red Hat Enterprise Linux 8 nginx, nginx-mod-mail, nginx-filesystem, nginx-mod-stream, nginx-all-modules, nginx-mod-http-perl, +2 more Red Hat Enterprise Linux 9 nginx, nginx-core, nginx-mod-mail, nginx-filesystem, nginx-mod-stream, nginx-all-modules, +3 more Red Hat Enterprise Linux 10 nginx
    not affected: vulnerable code not present
  • Red Hat Hardened Images nginx
    not affected: component not present
  • Red Hat Lightspeed proxy 1 insights-proxy/insights-proxy-container-rhel9
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
yes
Technical impact
partial
Assessed
14 mo ago

Exploit prediction

0.50% chance of exploitation in the next 30 days, higher than 42% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
CNA 4.0 6.9 CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
CNA 4.0 6.9 CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
NVD 3.1 5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Affected products

  • F5 BIG-IP
  • F5 BIG-IP Next
  • F5 BIG-IP Next SPK
  • F5 BIG-IP Next CNF
  • F5 BIG-IP Next for Kubernetes

Classification

Weakness
  • CWE-770 Allocation of Resources Without Limits or Throttling

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.