Make your family harder to hack, starting today

AI tools found serious flaws in software much of the internet runs on, and the best defence at home is up-to-date devices and stronger sign-ins. Here is the household checklist, plus a prompt that fits it to your family.

How-to

On 21 October, PHP, widely used website software, fixed two critical flaws, and a security firm used an OpenAI model to help find them, and CISA, a government cyber security agency, told organisations to patch at once.

OpenAI expects findings like these to “increase sharply in the coming months”. Website owners fix the PHP flaw; your part is the phones, laptops, router and accounts in your home.

Paste the prompt below into any AI chat with a list of your family’s devices to hand, and it builds a checklist for your people.

The prompt: build your household’s checklist

PromptBuild my household security checklist
You are helping me run a security check for my household after a week of news about AI tools finding serious flaws in widely used software. Act like a patient, careful family IT helper: someone who knows that a missed update, a reused password or a code read out to a stranger is how ordinary families actually get hurt, and who never pretends to know something they cannot see. You cannot see my devices or accounts, so everything you say about them comes only from what I tell you here. If you guess, I may believe a device is safe when it is not, so say "not sure" whenever you are not sure.

ABOUT MY HOUSEHOLD (I fill this in once; any line can say "not stated")
- Country I live in: [e.g. "United States", "Canada", "South Africa", "Malaysia"]
- People, with age and how confident they are with tech: [e.g. "me, 44, confident", "my partner, 46, uses the phone for banking only", "my mum, 78, lives alone, has an iPad", "my adult daughter, 24"]
- Who looks after whose devices and accounts: [e.g. "I set up mum's iPad and know her Apple Account email", "my partner manages their own", "nobody looks after the router"]
- Phones and tablets, with make, model and owner: [e.g. "iPhone 13, mine", "Samsung Galaxy A52, partner", "iPad 7th generation, mum"]
- Computers, with operating system and owner: [e.g. "Windows 10 laptop, shared family computer", "MacBook Air 2020, mine", "Chromebook, daughter"]
- Browsers each person uses: [e.g. "Chrome on the laptop", "Safari on the phones", "not sure"]
- Internet router, and who supplied it: [e.g. "box from my internet provider, model on the label is ABC123", "bought it myself, brand and model on the label", "not sure"]
- Other connected things: [e.g. "smart TV, video doorbell, baby monitor", "a tablet nobody uses any more", "none"]
- Shared accounts: [e.g. "one streaming login for the whole family", "a family email used for utility bills", "mum's bank password is written in her diary"]
- What my household already uses:[e.g. "password manager: none", "two-step sign-in on my bank only", "family code word: no"]
- What worries me most: [e.g. "mum answers every call", "the old laptop", "my daughter downloads browser add-ons from random sites"]

WORK IN STAGES

Stage 1. Check what is missing. Read my set-up back to me as a short table: person, device or account, owner, who looks after it. Mark any line I left as "not stated", or that is too vague to act on (for example "Samsung phone" with no model), as [NEED DETAIL] and ask me for all the missing details in one list. If the country, the list of people or the list of devices is missing, stop here and ask before going on.

Stage 2. Updates, device by device. For each device give me: where to check for updates on that device, how to turn on automatic updates, and what "up to date" should look like on the screen. If you are not sure of the exact menu name for that model or version, write [CHECK ON DEVICE] and describe what to look for. Never tell me a device is up to date or still supported: tell me to open the update screen on the device itself, read what it says, and report back to you with both the version number and the date of the last security update where the screen shows one.
- If a security update date I report looks old, flag that device as possibly no longer supported and tell me to check the maker's support page, because on an old device "up to date" can simply mean no more updates are coming.
- If a device may no longer get security updates (an older operating system, an old phone or tablet, or a maker that may have stopped updates), raise it as a question to check, never as a fact, and tell me where to check: the device's own update screen or the maker's support page. Then give me the options in order of safety: replace it; keep it only for jobs with no logins, banking or shopping; or take it off the internet.
- If a computer is shared by the family, put it first in the list, because everyone's logins pass through it.
- If the router came from my internet provider, tell me to ask the provider whether it updates itself and whether a newer model is available. If I bought it, tell me to look for a firmware update and an automatic update option in its app or its admin page (the address is often printed on the label).
- Browsers: tell me how to check each browser I listed is on its latest version and has been restarted to finish updating.
- Other connected things: for each, ask whether it is still in use. If not, tell me to unplug it and remove it from the home Wi-Fi. If it is, tell me to look for updates in its app.

Stage 3. Accounts, person by person. For each person, list their most important accounts in this order: main email, phone account, bank and payment apps, then shared accounts. For each account give one next step: move the password into a password manager, add a passkey where the service offers one, or turn on two-step sign-in. Only suggest a passkey on a device that only that person uses, because anyone who can unlock the device can then reach the account; on a shared computer or tablet, suggest two-step sign-in. Before any two-step step, tell me to check the account's recovery email and phone number are current, and to save the backup codes (if the service offers them) somewhere safe away from the phone. Explain in one line why email comes first: it is where password resets for every other account land. Never ask me for a password, code, PIN or recovery key, and tell me to stop if I start typing one into this chat.
- If a person is older or less confident: write their steps as a short numbered script I can do with them in person or on a video call, one action per line, including checking their recovery email and phone number, and add a plan for who they call before acting on any call, text or email that asks for money, a code or a login.
- If an account is shared: say who should own it, suggest a separate login for each person where the service allows it, and tell me to change the shared password after anyone who no longer needs it has been removed.
- If a password is written down somewhere others can see: suggest a safer place, kindly, without making anyone feel foolish.

Stage 4. Household rules. Draft three short rules my household can agree on, in plain words that both the youngest and the oldest person I listed would follow: what to do with any call or message that asks for money or a code; using a family code word to check any urgent call that sounds like a family member; and who to tell straight away after clicking something odd or giving out a detail. Leave the code word blank for my household to choose together; never suggest one.

Stage 5. One page to keep. Give me the whole plan as a checklist grouped by person, with a tick box on each line, the device or account it belongs to, and who does it. Put the three highest-risk items at the top, each with one line on why it comes first. Where reporting fraud depends on my country, name the type of place to contact (for example "your bank's fraud line" or "your national cyber security agency") and mark it [CHECK LOCALLY]; do not name an agency or phone number you are not sure of.

SELF-CHECK BEFORE YOU ANSWER
- Every person, device and account I listed appears in the plan, or is marked [NEED DETAIL].
- You did not state that any device is up to date or still supported; every update line tells me to confirm on the device itself.
- Every menu name you were unsure of carries [CHECK ON DEVICE].
- You asked for no password, code, PIN or recovery key.
- No passkey is suggested on a shared device.
- Each older or less confident person has a script for in person or a video call.
- Every device has a version and a security update date to report, or a note on where to find them.
- Every agency, law or phone number you mention is one you are sure of for my country, or is marked [CHECK LOCALLY].

Model names and ages are enough for the set-up. Keep passwords, codes and account numbers out of the chat; the prompt tells the AI never to ask for them.

The checklist, one reason each

Here is what the prompt works through, if you would rather go by hand. Only install updates from the device’s own Settings, never from a pop-up or a link in a text or email.

  1. Turn on automatic updates on every phone and tablet. Fixes for newly found flaws reach you as updates. On an iPhone or iPad, Apple’s path is Settings > General > Software Update > Automatic Updates, which installs overnight while it charges on Wi-Fi. On Android, Google’s path is Settings > System > Software updates, though menu names vary by maker.
  2. Update every laptop. On a Mac, open System Settings > General > Software Update (Apple). On Windows 11, open Start > Settings > Windows Update; on Windows 10, Start > Settings > Update & Security > Windows Update (Microsoft).
  3. Update and restart the browser. The browser opens every site you sign in to. In Chrome, go to More > Help > About Google Chrome and Relaunch if offered; Safari updates with the Mac.
  4. Update the router. It sits between every device in the house and the internet. Look for a firmware update (firmware is the software built into the router) and an automatic update switch in its app or its admin page, the settings page at the address on its label. If your internet provider supplied it, ask whether it updates itself.
  5. Find the devices that no longer get updates. Unpatched devices stay open after a fix goes public. Android shows its security update date under Settings > About phone > Android version. If a device gets no more updates, replace it, or keep it off logins and banking.
  6. Check any Windows 10 PC. Windows 10 no longer gets free security fixes. Microsoft’s Extended Security Updates (read 26 October 2026) cover eligible Windows 10 PCs (version 22H2) until 12 October 2027. They are free if you sync your PC settings, meaning you back them up to your Microsoft account with the Windows Backup app, though options vary by region.
  7. Move every password into a password manager. Reused passwords are how one leak from a site you used years ago becomes a takeover of your email. The manager built into your phone or browser is a fine start; begin with email and bank.
  8. Add a passkey or two-step sign-in to email first. Every other account sends its password resets there. A passkey signs you in with your face, fingerprint or screen lock in place of a password, and Google says it cannot be shared or copied. First check the recovery email and phone are current, and keep backup codes away from the phone.
  9. Only add a passkey on a device that only you use. Google warns that anyone who can unlock the device can then reach the account, so on a shared family computer, use two-step sign-in.
  10. Agree that nobody reads out a code. A one-time code from your bank is the last lock on the account, and scammers who know your name and address from an old data breach can sound convincing enough to ask for it. Hang up and call the number on the back of the card.
  11. Pick a family code word for urgent calls. Ask for it whenever a call that sounds like a relative wants money in a hurry; the voice-clone scam guide covers how to set one up.
  12. Close the doors nobody uses. Delete apps and accounts you no longer use, and unplug smart gadgets that sit idle, since an old account still holding an old password is an easy way in.

The honest bit

  • The AI only knows what you type. It cannot see whether a phone is up to date or a router still gets fixes, so the update screen on each device is your proof. After the session, open it on every device and check it says up to date.
  • “Up to date” can mean nothing new is coming. On an old device, that message can appear because the maker has stopped sending updates. Step 5 shows where Android keeps its security update date, and for any device, check the maker’s support page to see whether it is still supported.
  • This lowers your risk; no checklist removes it. CISA had seen no successful attacks on the PHP flaw when it published, but attackers are reported to be probing for it, so do the updates as soon as you can.
  • Where the facts come from. The facts here come from CISA’s alert, OpenAI’s disclosure, and Apple, Google and Microsoft help pages, read 24 and 26 October 2026, with credit to Business Insider’s summary of Matt Shumer’s post (22 October) for the push to close unused doors.

Do it now

Pick the person in your family least likely to update anything, sit down with their phone, and do steps 1, 8 and 10 together, starting with their email; leave the password manager for a later visit. Then run the prompt for everyone else.

A few quick questions

Do I need to fix PHP myself?

No. PHP runs on the servers behind websites, so website owners and their hosting companies install the fix. Your part is your own devices and accounts.

Is it safe to put my family’s devices in an AI chat?

Yes, at the level the prompt asks for: device models, ages and who uses what are fine. Never type a password, code, PIN or recovery key into the chat.