by Kastro
Paper/Archive/CVE-2026-94127

CVE-2026-94127

F5 BIG-IP — BIG-IP APM OAuth vulnerability

KEV · due 25 SepEPSS 25%public exploitSSVC actCVSS 9.8
critical.is priorityof 100
99
CVSS 9.8 (CNA)9.8 / 10 × 3029.4In CISA KEV+3030.0EPSS percentile 97.9.979 × 2019.6Exploit: SSVC active+1010.0SSVC exploitation: active+1010.0
Description · from the CVE record

When a BIG-IP APM access policy and an OAuth profile are configured on a virtual server, specific malicious traffic can lead to remote code execution (RCE). This vulnerability is only present when BIG-IP APM is configured as an OAuth Authorization Server. Deployments using APM strictly as an OAuth Client / Resource Server (without OAuth authorization server profiles configured) are not affected by this vulnerability. Impact: This vulnerability allows an unauthenticated attacker to perform remote code execution. The BIG-IP system in Appliance mode is also vulnerable. This is a data plane issue; there is no control plane exposure. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

Affected

ProductAffectedFixed inSource
BIG-IP21.1.0 – < Hotfix-BIGIP-21.1.0.2.0.30.22-ENGHotfix-BIGIP-21.1.0.2.0.30.22-ENGCNA
BIG-IP17.5.0 – < Hotfix-BIGIP-17.5.1.9.0.160.12-ENGHotfix-BIGIP-17.5.1.9.0.160.12-ENGCNA
BIG-IP17.1.0 – < Hotfix-BIGIP-17.1.3.5.0.41.14-ENGHotfix-BIGIP-17.1.3.5.0.41.14-ENGCNA

Scores by source

f5 (CNA)9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
f5 (CNA)9.3CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
CISA ADPSSVCExploitation: active · Automatable: yes · Technical impact: total

References

advisorymy.f5.com/manage/s/article/K000162605refcisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-94127kevcisa.gov/known-exploited-vulnerabilities-catalog