BIG-IP 21.1
21.1
Os Release
· BIG-IP Series
Is BIG-IP 21.1 still maintained?
Yes. F5 Networks actively maintains BIG-IP 21.1. See F5 Networks's lifecycle bulletin.
When do security fixes for BIG-IP 21.1 stop?
Engineering fixes for BIG-IP 21.1 — including security patches — stop on 2029-05-05. After that date, a device on this release cannot be patched against newly disclosed vulnerabilities without upgrading, which is the point that matters for KEV exposure and compliance.
What should I upgrade BIG-IP 21.1 to?
Upgrade to a currently maintained F5 Networks release. Check the release-train table on the vendor page for the nearest supported version.
BIG-IP 21.1 Release Lifecycle
BIG-IP 21.1 is a F5 Networks BIG-IP software release. Releases are maintained on a fixed schedule: F5 Networks ships fixes and security patches until the release reaches end of engineering, after which a device must be upgraded to a maintained release to stay patchable. The dates below are milestones for the software train, not for any specific appliance — hardware running this release has its own separate lifecycle. Vendor support will continue until .
Lifecycle Milestones
| Lifecycle notice published | 2mo ago | |
|---|---|---|
| End of software maintenance | in 2y 10mo | |
| End of security vulnerability support | in 2y 10mo | |
| Last date of support | in 2y 10mo |