CVE-2026-94127

BIG-IP APM OAuth vulnerability

CRITICAL

9.8

CVSS Score

Published: September 22, 2026 at 02:17 PM UTC

Updated: September 23, 2026 at 03:09 PM UTC

2 products affected across 1 vendorBig IP Access Policy ManagerBIG-IP

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Severity

CRITICAL9.8

Exploitation

CISA KEV

Exploit prediction

EPSS 27%

SSVC

Active

Actively Exploited

CISA Known Exploited Vulnerabilities (KEV) Catalog

EPSS Score26.6%

EPSS (Exploit Prediction Scoring System) estimates a 26.6% chance this CVE is exploited in the wild within the next 30 days — higher than 98% of all CVEs. It complements CVSS: a high EPSS on a mid-severity CVE can still be urgent.

F5 BIG-IP APM contains a heap-based buffer overflow vulnerability when access policy and an OAuth profile are configured on a virtual server. This vulnerability could allow an unauthenticated attacker to perform remote code execution.

Required Action

Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.

Ransomware Use

Unknown

Added to KEV

Sep 22, 2026

Remediation Due

Sep 25, 2026

44 days overdue

Notes

For temporary mitigation to allow for proactive forensic triage, apply the vendor-provided iRule. Once completed, install the final vendor patch as soon as possible. For more information please see: https://my.f5.com/manage/s/article/K000162605

BOD 26-04: https://www.cisa.gov/news-events/directives/bod-26-04-prioritizing-security-updates-based-risk

Forensics Triage Requirements: https://www.cisa.gov/news-events/directives/bod-26-04-implementation-guidance-prioritizing-security-updates-based-risk

https://nvd.nist.gov/vuln/detail/CVE-2026-94127

Description

When a BIG-IP APM access policy and an OAuth profile is configured on a virtual server, specific malicious traffic can lead to Remote Code Execution (RCE). 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

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Big IP Access Policy Manager · F5

95%

17.0.0 ≤ v ≤ 17.1.317.5.0 ≤ v ≤ 17.5.121.1.0

BIG-IP · F5

60%

17.1.0 ≤ v < Hotfix-BIGIP-17.1.3.5.0.41.14-ENG17.5.0 ≤ v < Hotfix-BIGIP-17.5.1.9.0.160.12-ENG21.1.0 ≤ v < Hotfix-BIGIP-21.1.0.2.0.30.22-ENG17.1.0 17.5.0 21.1.0

Affected range stops below Hotfix-BIGIP-17.1.3.5.0.41.14-ENG, so it looks safe — our inference, not a vendor statement

Affected range stops below Hotfix-BIGIP-17.5.1.9.0.160.12-ENG, so it looks safe — our inference, not a vendor statement

Affected range stops below Hotfix-BIGIP-21.1.0.2.0.30.22-ENG, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

https://my.f5.com/manage/s/article/K000162605

References (2)

Vendor Advisory

Source: cverecord

https://my.f5.com/manage/s/article/K000162605

US Government Resource

Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0

https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-94127

SSVC — Action Prioritization

SSVCActiveAutomatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

9.8CRITICALf5

Attack Vector: NETWORK
Complexity: LOW
Privileges: NONE
User Interaction: NONE
Scope: UNCHANGED
Confidentiality: HIGH
Integrity: HIGH
Availability: HIGH

Vector?

Quick Info

StatusANALYZED

CWE

CWE-122

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