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Big Ip Access Policy ManagerApplication · F5

CVE-2026-40699

MEDIUM · 6.5 CVSS v3.1 Published 2026-05-13
Fix available
A fix is available. Upgrade to after 17.5.1 or later.
See remediation →
71/100
Remediation priority · Elevated
Remotely reachable Zero-click

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
A vulnerability exists in the undisclosed pages in the Configuration utility that may allow a low-privileged authenticated attacker to access to undisclosed sensitive information.  Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis · moderate confidence

Information disclosure vulnerability in undisclosed pages of a Configuration utility. A low-privileged authenticated attacker can access sensitive information that should be restricted, indicating improper access control on hidden configuration endpoints.

MitigationUpdate to a supported software version if a patch is available. Restrict and audit access to configuration utilities, ensuring low-privileged accounts cannot reach undisclosed or administrative endpoints.

Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.

Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.

NVD · CPE data
Big Ip Access Policy ManagerApplication
Affected:>= 17.1.0, <= 17.1.3>= 17.5.0, <= 17.5.1>= 16.1.0, <= 16.1.6
Big Ip Advanced Firewall ManagerApplication
Affected:>= 17.1.0, <= 17.1.3>= 17.5.0, <= 17.5.1>= 16.1.0, <= 16.1.6
Big Ip Advanced Web Application FirewallApplication
Affected:>= 17.1.0, <= 17.1.3>= 17.5.0, <= 17.5.1>= 16.1.0, <= 16.1.6
Big Ip AnalyticsApplication
Affected:>= 17.1.0, <= 17.1.3>= 17.5.0, <= 17.5.1>= 16.1.0, <= 16.1.6
Big Ip Application Acceleration ManagerApplication
Affected:>= 17.1.0, <= 17.1.3>= 17.5.0, <= 17.5.1>= 16.1.0, <= 16.1.6
Big Ip Application Security ManagerApplication
Affected:>= 17.1.0, <= 17.1.3>= 17.5.0, <= 17.5.1>= 16.1.0, <= 16.1.6
Big Ip Application Visibility And ReportingApplication
Affected:>= 17.1.0, <= 17.1.3>= 17.5.0, <= 17.5.1>= 16.1.0, <= 16.1.6
Big Ip Automation ToolchainApplication
Affected:>= 17.1.0, <= 17.1.3>= 17.5.0, <= 17.5.1>= 16.1.0, <= 16.1.6

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None

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

Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.

dbcve checks

Work through these to decide whether this CVE applies to you.

  1. Identify installed Big IP version
    Run 'tmsh show sys version' or check the Big IP web UI under Dashboard > Overview > System > Software Version
    Affected if The version output falls within 16.1.0-16.1.6, 17.1.0-17.1.3, or 17.5.0-17.5.1 for any installed Big IP module (APM, AFM, AWAF, Analytics, AAM, ASM, AVR, or Automation Toolchain)
  2. Confirm Configuration utility is accessible
    Attempt to access the Configuration utility via the Big IP web UI or API endpoint, or check if the '/configuration' or similar configuration pages are enabled in the management interface
    Affected if The Configuration utility is exposed and accessible to authenticated users
  3. Verify low-privileged user access restrictions
    Log in with a low-privileged (non-admin) user account and attempt to enumerate or access hidden or undocumented configuration endpoints that should be restricted to administrative roles
    Affected if A low-privileged authenticated user can access sensitive configuration data or pages that should be restricted to higher-privilege roles

You are affected if your Big IP version falls within the affected ranges AND the Configuration utility is accessible to low-privileged authenticated users who can reach undisclosed endpoints.

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

dbcve · scoped
Upgrade available Upgrade to a release after 17.5.1
Interim mitigation

Update to a supported software version if a patch is available. Restrict and audit access to configuration utilities, ensuring low-privileged accounts cannot reach undisclosed or administrative endpoints.

Recommended fix Moderate confidence

BIG-IP 16.1.7+ / 17.1.4+ / 17.5.2+ (depending on your current version branch)

  1. 1. Identify the currently installed BIG-IP version by running 'tmsh show sys version' or checking the Configuration utility (System > Software > Image).
  2. 2. Determine which version branch your current installation belongs to (16.1.x, 17.1.x, or 17.5.x).
  3. 3. For BIG-IP 16.1.x: Upgrade to version 16.1.7 or later.
  4. 4. For BIG-IP 17.1.x: Upgrade to version 17.1.4 or later.
  5. 5. For BIG-IP 17.5.x: Upgrade to version 17.5.2 or later.
  6. 6. Download the appropriate hotfix from downloads.f5.com or my.f5.com.
  7. 7. Upload the ISO/image via the Configuration utility (System > Software > Image) or via tmsh.
  8. 8. Install the new version following standard BIG-IP upgrade procedures.
Caveat Standard BIG-IP upgrade considerations apply - review release notes for any configuration changes, test in non-production environment first, and plan for maintenance window as upgrade may require reboot.

Generated from the published advisory — verify against the referenced sources before acting.

Fix this in Big Ip Access Policy Manager Scoped from the published advisory
  • Consultation4.0 h
  • Implementation8.0 h
  • Testing6.0 h
  • Review / QA4.0 h
22.0 hours of engineering $3,860
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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2026-40699 in production — separate from our analysis above.

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What this is

A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.

What belongs here
  • Verified mitigations, workarounds, and config changes
  • Version or environment caveats, and links to real fixes
  • No weaponised exploit code, or anything meant to cause harm
  • No spam, self-promotion, credentials, or personal data