Is itCheck something

No. CVE-2026-94127

F5 BIG-IP login systems can be taken over before login

Being used now

Yes. Attackers are using this right now.

Companies using F5 BIG-IP APM with an OAuth profile set up.

What to do

Apply F5's update for BIG-IP APM.

Confirmed in attacksSep 22, 2026
ProductF5 BIG-IP APM
GitHub repos2
Attack likelihood, next 30 days27%

Attack likelihood is EPSS, a daily estimate from FIRST.org of how likely this bug is to be used in attacks in the next 30 days.

The official description

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.

For your tech helper or AI assistant

A read-only checklist. Paste it into Claude, ChatGPT or a coding agent; it only looks and changes nothing.

Read-only check, change nothing, send nothing anywhere.
Is F5 BIG-IP APM (CVE-2026-94127) installed or running on this machine or in this project?
1. Find every copy and its version (apps, packages, containers, lockfiles).
2. Compare each version against the vendor's fixed version for CVE-2026-94127. Quote the vendor page you used.
3. Report a table: where, version, fixed version, status (exposed / fixed / not installed / unsure).
4. List the exact update steps, but do not run them.
Download playbook (.md)

Code on GitHub

Repos named after this bug. Some are scanners or write-ups, some are working attack code. Do not run them on a machine you care about.

Sources