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Big Ip Access Policy ManagerApplication · F5

CVE-2026-41219

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
An improper sanitization vulnerability exists in the BIG-IP QKView utility that allows a low-privileged attacker to read sensitive information from a QKView file.  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

This is an improper sanitization vulnerability in the BIG-IP QKView utility, a diagnostic tool that creates snapshot files of system configuration. The vulnerability allows a low-privileged attacker to read sensitive information from QKView files due to insufficient input validation or data sanitization during file processing.

MitigationApply the vendor patch for CVE-2026-41219 when released. Until then, restrict access to QKView files to trusted administrators only and limit who can create or import QKView files in the environment.

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. Check the BIG-IP system version
    Run 'tmsh show sys version' or inspect /etc/version to determine the installed version
    Affected if The version falls within 16.1.0-16.1.6, 17.1.0-17.1.3, or 17.5.0-17.5.1
  2. Identify installed BIG-IP modules
    Run 'tmsh list sys provision' to list all provisioned modules such as APM, AFM, ASM, Analytics, AVR, or AAM
    Affected if Any of the listed modules (APM, AFM, ASM, Analytics, AVR, AAM, or Automation Toolchain) are provisioned on an affected version
  3. Confirm QKView utility is accessible
    Verify if the qkview command exists on the system and check for any QKView files in common directories like /var/tmp/
    Affected if The qkview utility is present and QKView files exist on the system
  4. Verify user access to QKView files
    Check file permissions on QKView files and review user role assignments using 'tmsh list auth user' to determine if low-privileged users can access these files
    Affected if Users with low-privilege roles (such as Guest, Operator, or Read-Only) have read access to QKView files or the qkview utility

The environment is affected if the BIG-IP version is within the affected ranges AND QKView files can be accessed by low-privileged users.

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

Apply the vendor patch for CVE-2026-41219 when released. Until then, restrict access to QKView files to trusted administrators only and limit who can create or import QKView files in the environment.

Recommended fix Moderate confidence

Upgrade to 17.1.4 or later for 17.1.x branch; 17.5.2 or later for 17.5.x branch; 16.1.7 or later for 16.1.x branch

  1. 1. Identify the currently installed BIG-IP version by running 'tmsh show sys version' or checking the web UI.
  2. 2. Determine which version branch your current installation belongs to (16.1.x, 17.1.x, or 17.5.x).
  3. 3. Access the F5 download page at my.f5.com or consult the F5 security advisory for CVE-2026-41219 to obtain the specific hotfix or maintenance update.
  4. 4. Download the recommended update for your version branch (17.1.4+, 17.5.2+, or 16.1.7+).
  5. 5. Review F5 upgrade documentation and create a system backup/snapshot before proceeding.
  6. 6. Apply the update following F5's standard upgrade procedures for the BIG-IP platform.
  7. 7. After upgrade, verify the version matches the expected fixed release using 'tmsh show sys version'.
  8. 8. Confirm the QKView utility no longer exposes sensitive information by reviewing generated QKView files or applying any recommended configuration changes from the F5 advisory.
Caveat Always review F5 release notes for potential compatibility issues; test upgrades in a staging environment before production deployment

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
  • Consultation3.0 h
  • Implementation6.0 h
  • Testing4.0 h
  • Review / QA2.0 h
15.0 hours of engineering $2,640
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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-2026-41219 in production — separate from our analysis above.

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What this is

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What belongs here
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  • Version or environment caveats, and links to real fixes
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