Is CVE-2026-42063 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-42063 being exploited in the wild.

How severe is CVE-2026-42063?

Medium severity, with a CVSS score of 4.9, published 13 May 2026.

Which products and versions are affected?

F5 BIG-IP Advanced WAF 16.1.0 - 16.1.6, 17.5.0 - 17.5.1, 21.0.0; F5 Big-Ip Access Policy Manager 16.1.0 - 16.1.6, 17.5.0 - 17.5.1, 21.0.0; F5 Big-Ip Advanced Firewall Manager 16.1.0 - 16.1.6, 17.5.0 - 17.5.1, 21.0.0; F5 Big-Ip Local Traffic Manager 16.1.0 - 16.1.6, 17.5.0 - 17.5.1, 21.0.0; and 1 more.

Is there a fix for CVE-2026-42063?

No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

How is CVE-2026-42063 attacked?

It is attacked over the network, in a network appliance.

Am I affected by CVE-2026-42063?

Check whether you run F5 BIG-IP Advanced WAF, F5 Big-Ip Access Policy Manager, F5 Big-Ip Advanced Firewall Manager or one of the others listed at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-42063: F5 BIG-IP sensitive file download in iControl SOAP

CVE-2026-42063 · Severity: medium · CVSS 4.9 · Published 2026-05-13

A vulnerability in F5 BIG-IP devices could allow a high-privileged user to download sensitive system files. These devices are commonly used to manage and secure corporate network traffic and applications. While an attacker must already have administrative access, this flaw allows them to bypass intended restrictions to access confidential data they should not be able to reach.

Technologies: F5 BIG-IP Advanced WAF, F5 Big-Ip Access Policy Manager, F5 Big-Ip Advanced Firewall Manager, F5 Big-Ip Local Traffic Manager. Vendors: F5.

Quick answers

Is CVE-2026-42063 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-42063 being exploited in the wild.
How severe is CVE-2026-42063?: Medium severity, with a CVSS score of 4.9, published 13 May 2026.
Which products and versions are affected?: F5 BIG-IP Advanced WAF 16.1.0 - 16.1.6, 17.5.0 - 17.5.1, 21.0.0; F5 Big-Ip Access Policy Manager 16.1.0 - 16.1.6, 17.5.0 - 17.5.1, 21.0.0; F5 Big-Ip Advanced Firewall Manager 16.1.0 - 16.1.6, 17.5.0 - 17.5.1, 21.0.0; F5 Big-Ip Local Traffic Manager 16.1.0 - 16.1.6, 17.5.0 - 17.5.1, 21.0.0; and 1 more.
Is there a fix for CVE-2026-42063?: No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2026-42063 attacked?: It is attacked over the network, in a network appliance.
Am I affected by CVE-2026-42063?: Check whether you run F5 BIG-IP Advanced WAF, F5 Big-Ip Access Policy Manager, F5 Big-Ip Advanced Firewall Manager or one of the others listed at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

A vulnerability classified as CWE-552 (Files or Directories Accessible to External Parties) exists in the iControl SOAP interface of F5 BIG-IP. The flaw allows an authenticated attacker with high privileges (Resource Administrator or Administrator roles) to bypass file access restrictions and download sensitive system files. The attack is reachable over the network via the SOAP API. While the attacker requires existing administrative credentials, the vulnerability represents a failure to properly enforce access controls on sensitive filesystem resources. F5 has released updates for affected versions including 16.1.x and 17.5.x.

Affected products

F5 BIG-IP Access Policy Manager 16.1.0 - 16.1.6, 17.5.0 - 17.5.1, 21.0.0
F5 BIG-IP Advanced Firewall Manager 16.1.0 - 16.1.6, 17.5.0 - 17.5.1, 21.0.0
F5 BIG-IP Advanced WAF 16.1.0 - 16.1.6, 17.5.0 - 17.5.1, 21.0.0
F5 BIG-IP Local Traffic Manager 16.1.0 - 16.1.6, 17.5.0 - 17.5.1, 21.0.0

Timeline

2026-05-13: advisory: Initial publication of the vulnerability advisory

References

https://my.f5.com/manage/s/article/K000160973

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