Is CVE-2026-40060 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-40060 being exploited in the wild.

How severe is CVE-2026-40060?

High severity, with a CVSS score of 7.5, published 13 May 2026.

Which products and versions are affected?

F5 BIG-IP Advanced WAF 17.5.0 - 17.5.1, 17.1.0 - 17.1.3, 16.1.0 - 16.1.6, 21.0.0; F5 BIG-IP ASM 17.5.0 - 17.5.1, 17.1.0 - 17.1.3, 16.1.0 - 16.1.6, 21.0.0.

Is there a fix for CVE-2026-40060?

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-2026-40060 attacked?

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

Am I affected by CVE-2026-40060?

Check whether you run F5 BIG-IP Advanced WAF or F5 BIG-IP ASM 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-2026-40060: F5 BIG-IP Advanced WAF and ASM denial of service in bd process

CVE-2026-40060 · Severity: high · CVSS 7.5 · Published 2026-05-13

A vulnerability in F5 BIG-IP security products can allow an attacker to crash a critical system process by sending specific network requests. This affects the Advanced Web Application Firewall (WAF) and Application Security Manager (ASM) modules, which are used to protect web applications from cyberattacks. If exploited, the security service may become unavailable, potentially leaving applications unprotected or causing a disruption in network traffic.

Technologies: F5 BIG-IP Advanced WAF. Vendors: F5.

Quick answers

Is CVE-2026-40060 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-40060 being exploited in the wild.
How severe is CVE-2026-40060?: High severity, with a CVSS score of 7.5, published 13 May 2026.
Which products and versions are affected?: F5 BIG-IP Advanced WAF 17.5.0 - 17.5.1, 17.1.0 - 17.1.3, 16.1.0 - 16.1.6, 21.0.0; F5 BIG-IP ASM 17.5.0 - 17.5.1, 17.1.0 - 17.1.3, 16.1.0 - 16.1.6, 21.0.0.
Is there a fix for CVE-2026-40060?: 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-2026-40060 attacked?: It is attacked over the network, in a network appliance.
Am I affected by CVE-2026-40060?: Check whether you run F5 BIG-IP Advanced WAF or F5 BIG-IP ASM 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 denial-of-service vulnerability exists in the F5 BIG-IP Advanced WAF and ASM modules due to an unchecked return value (CWE-252) during the processing of specific network requests. When a security policy is active on a virtual server, an unauthenticated attacker can send undisclosed requests that cause the 'bd' (the main enforcement engine) process to terminate. This results in a service disruption for the affected virtual server. The vulnerability affects multiple versions across the 16.x, 17.x, and 21.x branches. F5 has released updates for several versions, including 17.5.1.4, 17.1.3.1, and 21.0.0.1, to address the issue.

Affected products

F5 BIG-IP Advanced WAF 17.5.0 - 17.5.1, 17.1.0 - 17.1.3, 16.1.0 - 16.1.6, 21.0.0
F5 BIG-IP ASM 17.5.0 - 17.5.1, 17.1.0 - 17.1.3, 16.1.0 - 16.1.6, 21.0.0

Timeline

2026-05-13: advisory: Initial advisory published by F5 Networks

References

https://my.f5.com/manage/s/article/K000160727

This page as Markdown. Free to reuse under CC BY 4.0 with a link back.