Check the support promise
A device may still work after its manufacturer stops monitoring defects and issuing fixes. A February 2026 CISA, FBI and UK NCSC fact sheet calls this end of support. It discusses network-edge equipment such as routers, firewalls and VPN gateways. [1]
- Supported: future fixes still possible
- Unsupported: final fixes may be past
- Check: exact model and lifecycle date
The last patch has a boundary
The agencies recommend tracking support dates and replacing unsupported edge devices. If replacement cannot happen immediately, the latest supported software can address flaws known up to that update. That does not turn the last available patch into an ongoing supply of future fixes. [1]
Keep the scope straight
The cited federal directive applies to US federal civilian executive-branch agencies. The fact sheet encourages other organizations to use the guidance; it does not impose that federal requirement on every reader. [1]
Go a little deeper
Optional reading · about 1 more minute
A practical inventory question
Our practical recommendation: Ask the person responsible for your network to record the exact model, software version, vendor support date and replacement owner. Avoid making a purchasing decision from the product’s age alone. For managed equipment, coordinate changes with the administrator.
Two identical screens, two different meanings
Hypothetical example: Two routers both say there are no updates. One remains supported; the other has reached its final release. The screens look equally quiet, but only a lifecycle check explains why. Neither screen by itself is a complete security assessment.
Original sources
Attributed synthesis, not original reporting. Examples labeled hypothetical or illustrative are explanatory. Reviewing a source does not independently validate its findings.
- CISA, FBI and NCSC: End-of-support edge devices ↗
February 5, 2026 public joint fact sheet hosted by FBI IC3; pages 1–2 read September 19. Organizational guidance; federal directive scope explicitly limited.