Router Firmware Updates Explained: Why They Matter

What router firmware is

Router firmware is the low-level software stored on the router's flash memory. It runs as soon as the router powers on and controls how the hardware behaves: how the Wi-Fi radios transmit, how traffic is routed, which security protocols are active, and what you see when you open the admin page. For a broader view of the device itself, start with what is a router.

Firmware is the layer that puts Wi-Fi standards into practice on a specific router. The IEEE 802.11 standard defines the medium access control and physical layer specifications that Wi-Fi devices use to communicate. The Wi-Fi Alliance, meanwhile, describes Wi-Fi CERTIFIED devices as including the latest security, encryption, and authentication protections. A router's firmware translates those requirements into everyday behavior.

• Firmware typically controls:
• Wi-Fi radio settings and channel behavior
• Security features such as firewall rules and current Wi-Fi protections
• Routing and network management
• The admin and monitoring interface

Why firmware updates matter

Security is the most important reason. Wi-Fi security keeps evolving. The Wi-Fi Alliance says Wi-Fi CERTIFIED devices include the latest security and that its technology portfolio continues to evolve to address modern use cases. Routers that never receive updates can miss protections such as WPA3 and Protected Management Frames. If you want a refresher on the basics, see router security basics and WPA3 explained.

Firmware updates also fix bugs and improve reliability. A router is a small computer, and its software can have errors that affect stability, compatibility, or performance. Updating replaces that code with a newer revision. These fixes do not change the physical hardware, but they can make the network run more smoothly with newer clients.

Router makers also use firmware updates to add and refine support for current Wi-Fi generations. The Wi-Fi Alliance describes Wi-Fi 6 as introduced in 2018 and Wi-Fi 7 as introduced in 2024, with features including OFDMA, multi-user MIMO, 320 MHz channels in the 6 GHz band, and multi-link operation. A router needs the right hardware for those features, but the firmware must implement them correctly. See Wi-Fi 6 explained and Wi-Fi 7 explained for the details.

How to check for firmware updates

The checking process is similar on most routers. Open a browser, go to the router's administration page, and sign in with the administrator password. Look for a section named Firmware Update, System Tools, Administration, Maintenance, or something similar. The exact label depends on the router, so check the maker's support documentation if you do not see it.

Some routers can check for updates over the internet with a button. Others require you to download a firmware file from the maker's support page and upload it in the admin interface. In both cases, do not interrupt the process while it is running. Wait for the router to finish and reboot, then confirm that the new version is listed.

• Steps to check for updates:
• Log in to the router admin page
• Find the firmware update section
• Check for updates, or download a file from the maker and upload it
• Wait for the reboot and verify the firmware version

When you should update

The best time to check is when you first set up a router and again whenever you hear about a security advisory or compatibility fix. If your router offers automatic updates, enabling them can keep it current without extra effort. You should still know how to see which firmware version is installed.

An update is not a risk-free change. Occasionally a new firmware version can reset settings or behave differently with older hardware. Read the release notes before updating so you know what changed. That caution is not a reason to skip updates; it is a reason to be deliberate about installing them.

Keeping network equipment updated is part of a broader security habit. NIST develops cybersecurity standards, guidelines, and best practices that organizations and individuals can use to protect systems. Applying those habits at home includes checking for router firmware updates and acting on them.

Firmware updates and new Wi-Fi standards

Newer Wi-Fi standards bring real changes, but they also require hardware support. The Wi-Fi Alliance notes that Wi-Fi 7 uses wider 320 MHz channels in the 6 GHz band and features such as 4K QAM and multi-link operation, while Wi-Fi 6 introduced OFDMA and multi-user MIMO. Firmware updates can implement those features on routers whose chips already support them, but no update can add a missing radio or antenna. A dual-band router without a 6 GHz radio will not become a 6 GHz device.

Before you buy a new router, check which Wi-Fi generation it supports and how the maker handles updates. That is more useful than chasing a single speed number. If you are choosing now, best Wi-Fi 7 routers and best Wi-Fi 6E routers compare current models on the features that matter.

What to do when updates stop

Routers do not receive firmware updates forever. Makers eventually stop releasing new firmware for older models. At that point the router may still work, but it will no longer receive security patches. Given that Wi-Fi security continues to evolve, an unpatched router becomes a weaker point on your network.

The practical answer is to replace a router that no longer receives updates. Look for a current model from a maker that publishes regular firmware releases and supports modern security. If you need whole-home coverage, a mesh system is often the better fit; see best mesh systems. For a single strong router, start with the best Wi-Fi 7 routers.

What to pick for your use

Questions

Can a firmware update make my old router support Wi-Fi 7?

Not usually. Wi-Fi 7 requires hardware features such as wider 320 MHz channels in the 6 GHz band. Firmware can improve an existing router and fix bugs, but it cannot add missing radios. To get Wi-Fi 7 you need a router designed for it; see best Wi-Fi 7 routers.

How do I find the firmware version on my router?

Sign in to the router admin page, look for a status, system, or about section, and read the firmware or software version. The same page often has an update button. If you cannot find it, check the maker's support documentation.

Should I enable automatic firmware updates?

Automatic updates can close security holes quickly and are convenient for most people. If you prefer more control, disable automatic updates and check manually on a regular schedule instead. Either way, install updates as they become available.

Is it safe to update router firmware?

Updating is normally safe if you use the maker's official firmware file and do not interrupt the process. If an update fails, the router may need to be reset or recovered. You can reduce risk by reading release notes before updating.

What happens if I never update my router?

The router may continue working, but it will miss security patches and compatibility fixes. As Wi-Fi security evolves, an unpatched router becomes a weaker point on your network. Replacing it is the right move if updates are no longer available.

Do router firmware updates make my internet faster?

They can fix performance issues and improve efficiency, but the physical internet speed is set by your Internet provider. The biggest gains come from features and capacity inside the local network.