Microsoft's October 2026 Patch Tuesday, released October 13, set a new record with more than 1,400 security fixes, about 45% more than September's record of 966. One Windows flaw in this release is already being used in real attacks to make dangerous downloads look safe, and Windows 11 version 24H2 Home and Pro just received its final security update. Here's what Bryan Longworth covered on A Faster PC Live Technical Support, explained for business owners and home users on Florida's Treasure Coast, Space Coast, and South Florida, with no technical degree required.
A Record-Breaking Patch Tuesday: 1,400+ Fixes in One Month
Last month, September's record Patch Tuesday brought 966 fixes, the biggest ever at the time. October blew past it with more than 1,400 flaws, and more than 70 of them are rated critical.
What the record means for your business
Nobody installs 1,400 updates by hand. Whether you run a business or just own a computer, you need a patch management system that:
- Installs updates automatically
- Checks that they actually worked
- Catches the one computer that got missed
The gap between when a fix comes out and when it's actually installed on your computer is where cybercriminals live. Falling one month behind now means you're 1,400 open doors behind. If no one is watching that gap for your business, this is the month to fix it, and it's the core of the advanced cybersecurity and managed patching A Faster PC provides.
The Active Zero-Day: A Mark of the Web Bypass in Windows
Microsoft disclosed three new zero-day flaws this month, but only one is confirmed under active attack. It's in Windows itself, and it gets around a safety tag called Mark of the Web. Make it your first priority.
How Mark of the Web normally protects you
When you download a file from the internet, Windows quietly tags it as coming from the outside world. That tag is why you see the "Are you sure you want to open this?" warning, and why Microsoft Office opens downloaded files in a locked-down safe view. This flaw lets a specially crafted file skip that tag, so no warning pops up and the safe view never kicks in.
Why this matters for phishing
Almost every email scam depends on you opening something that looks normal:
- A fake invoice attachment
- A shared document link
- A download from a fake support page
Each of these gets far more dangerous when the safety warnings silently disappear. Microsoft hasn't said who is exploiting the flaw or how widespread it is, so assume it's showing up in real phishing emails right now.
What to do now
- Install this month's Windows updates today.
- Until you do, treat unexpected downloads with extra suspicion, even if Windows doesn't warn you.
- Businesses: patch this first, then verify it's actually installed on every machine.
Windows 11 Version 24H2 Home and Pro Just Lost Security Support
A Faster PC first warned about this deadline in July and again in September. Now the date is here. Microsoft says the October update is the last security update ever for Windows 11 version 24H2 Home and Pro, and those PCs stop receiving security fixes after it. Microsoft says the same is true for Windows 10 Enterprise LTSB 2016, and next month Windows 11 version 23H2 Enterprise, Education, and IoT devices lose updates as well.
What happens if you do nothing
Your computer keeps working, which is exactly what makes this easy to ignore. But every new flaw found from now on, including silent warning bypasses like the one above, stays open on that machine forever. With 1,400-plus fixes in a single month, an unsupported PC falls behind very fast.
The 10-second Windows version check
- Click the Start button.
- Type winver and press Enter.
- If the window says 24H2, move to a newer, supported version of Windows 11 this week.
If your PC can't run a newer version, that's your signal to plan a replacement now, not after something breaks. Businesses with a mix of machines should build a list of which computer runs which version, because this is exactly the kind of deadline that catches the one forgotten front-desk computer.
More Serious Microsoft Flaws to Patch Next
Analysts flagged several more serious Microsoft flaws. None are reported as exploited yet, but they're the kind attackers go looking for next.
- Exchange Server: A specially crafted email could let an attacker take over during content conversion. Microsoft rates it hard to pull off, but after last month's Exchange flaw and a year of Exchange stories, don't ignore it.
- SharePoint: Two serious flaws could let an attacker gain complete control. SharePoint kept making headlines all summer, including the SharePoint emergency we covered in July.
- Microsoft Office: Two Outlook flaws and one PowerPoint flaw each score 9.8 out of 10 in severity, plus a large batch of fixes in Excel, Word, and Visio.
- Windows DHCP Server: If you run your own office server, the DHCP service that hands out network addresses got ten takeover fixes, five of them critical. Put it near the top of your list.
- .NET Framework: A bypass found by Google's James Forshaw could get around the feature some companies use to allow only approved software to run. No attacks have been seen, but the details are public, so the clock is ticking.
- MessagePack: A minor crash bug that most businesses can ignore.
Adobe's Perfect 10: A Critical Flaw in Adobe Commerce (Magento)
Adobe patched about 140 flaws across ten bulletins and says none are exploited yet. The one to know is in Adobe Commerce, the online store platform formerly called Magento. CVE-2026-103849 is rated a perfect 10 out of 10 and lets an attacker run their own code with no login required. Commerce received 11 fixes in total, several of them critical.
If that sounds familiar, it's because last month A Faster PC covered a different perfect-10 Commerce flaw called StyleSmuggler that attackers were using before a fix existed. Adobe specifically says store owners should apply this month's hotfix alongside this update if they haven't already, so check that both are in place.
Other Adobe updates this month:
- ColdFusion: 32 fixes, including takeover and complete-control bugs
- Content Credentials SDK: 30 fixes
- Photoshop: 18 fixes
- Substance 3D Stager: 16 fixes
If you run an online store, or your website runs on any of these, don't wait on this one.
Rapid-Fire Roundup: VPNs, Firewalls, and Business Systems Under Attack
Several other business systems received fixes you should act on, and a few were exploited before the fix existed.
- Citrix NetScaler (CVE-2026-88779): Attackers were using this flaw before the patch. The NetScaler emergency A Faster PC covered a couple of weeks ago keeps getting longer.
- Fortinet FortiMail (CVE-2026-104286): A critical flaw that was also exploited before the fix. After last month's exploited Fortinet firewall bugs, check every Fortinet product in your environment.
- Ivanti Connect Secure: Ivanti disclosed an actively exploited flaw in its VPN product. If your team works remotely through Ivanti, patch now.
- Atlassian Confluence, Jira, and Bitbucket (CVE-2026-21589): A critical flaw in self-hosted versions that attackers began exploiting after sample attack code was published.
- SAP: 20 fixes, including a maximum-severity bug in its cloud SDK for Python.
- SonicWall SMA 1000 (CVE-2026-102255): The third maximum-severity flaw in this product since July. Attackers have been probing it since about October 8, and there's no workaround, only the patch.
- GitLab: Critical fixes in its AI gateway and pipeline tools.
The one question every business owner should ask
You don't need to memorize these names. Just ask whoever handles your IT: "Can you confirm those patches were actually applied and verified, not just downloaded?"
Your 3-Step Patch Tuesday Checklist for This Week
- Install this month's Windows updates today to close the actively exploited Mark of the Web bypass that hides warnings.
- Type winver to check your Windows version, and move off 24H2 this week if you're on it.
- Verify patches landed everywhere. If you're a business, make sure someone confirms updates installed on every computer, your email and file-sharing systems, your online store, your VPN, and your firewall.
Frequently Asked Questions About the October 2026 Patch Tuesday
What happened in the October 2026 Patch Tuesday?
Microsoft released more than 1,400 security fixes on October 13, 2026, its largest Patch Tuesday ever and about 45% more than September's record of 966. More than 70 are rated critical, and one Windows flaw is already being used in real attacks. Install the updates promptly and confirm they actually landed on every computer.
What is the Mark of the Web zero-day and why is it dangerous?
Mark of the Web is a hidden tag Windows adds to files downloaded from the internet. It triggers the "Are you sure you want to open this?" warning and makes Office open downloads in a locked-down safe view. The actively exploited flaw lets a specially crafted file skip that tag, so a fake invoice or shared document can open with no warning at all. Installing this month's Windows updates closes it.
How do I check which version of Windows 11 I have?
Click the Start button, type winver, and press Enter. A small window shows your Windows version. If it says 24H2 on a Home or Pro edition, plan to move to a newer supported version of Windows 11 this week.
Is Windows 11 version 24H2 still getting security updates?
No. Microsoft says the October 2026 update is the last security update for Windows 11 version 24H2 Home and Pro. The computer keeps working, but every new flaw discovered from now on stays open on it. If the PC can't run a newer version, plan a replacement now rather than after something breaks.
Which other Windows versions are losing security updates?
Microsoft says Windows 10 Enterprise LTSB 2016 also received its final security update this month. Next month, Windows 11 version 23H2 Enterprise, Education, and IoT devices lose updates as well. Businesses should keep a list of which computer runs which version so no machine gets missed.
Does the Adobe Commerce vulnerability affect my online store?
If your store runs on Adobe Commerce, formerly called Magento, yes. CVE-2026-103849 is rated 10 out of 10 and lets an attacker run their own code without logging in. Adobe says it isn't exploited yet, but apply this month's update and hotfix and confirm both are installed.
Which VPNs and firewalls are under attack right now?
Flaws in Citrix NetScaler and Fortinet FortiMail were exploited before patches existed, and Ivanti disclosed an actively exploited flaw in its Connect Secure VPN. Self-hosted Atlassian Confluence, Jira, and Bitbucket came under attack after sample code went public, and attackers have been probing SonicWall's SMA 1000. Ask your IT provider to confirm these patches were applied and verified, not just downloaded.
Who can manage Patch Tuesday updates for my business on the Treasure Coast, Space Coast, or South Florida?
A Faster PC is a managed services provider that installs patches automatically, verifies they landed, and catches the forgotten computer for businesses and home users across Florida's Treasure Coast, Space Coast, and South Florida. Call 772-878-5978 or visit https://www.afasterpc.com/ to get started.
About A Faster PC
A Faster PC is the leading managed services provider (MSP) serving Florida's Treasure Coast, Space Coast, and South Florida. A Faster PC provides responsive IT support, advanced cybersecurity solutions, cloud backup, disaster recovery, breach remediation, patch management, computer repair, and technical support for accounting offices, attorneys' offices, medical offices, dental offices, professional offices, small- to medium-sized businesses, non-profits, churches, home office users, and individuals throughout the regions. We help our clients cut costs in their Internet, TV, and telephone bills and in business operations.
Every week at 10:07 AM EST, A Faster PC hosts A Faster PC Live Technical Support, which is a live Radio Show that is livestreamed to YouTube and Facebook and is available as a podcast. Visit our Live Technical Support page for various ways to schedule a technical support session and for various ways to listen to and watch A Faster PC Live Technical Support.
A Faster PC services the following counties and cities: St. Lucie County including: Port St. Lucie, Fort Pierce, St. Lucie West, Tradition, St. Lucie Village; Martin County including: Stuart, Jensen Beach, Jupiter Island, Ocean Breeze Park, and Sewall's Point; Indian River County: including Vero Beach, Sebastian, Fellsmere, Indian River Shores; Palm Beach County including: Jupiter, Jupiter Inlet Colony, Juno Beach, Tequesta, Palm Beach Gardens, North Palm Beach, Palm Beach Shores, Riviera Beach, West Palm Beach, Wellington, Royal Palm Beach, Greenacres, Lake Worth Beach, Lantana, Boynton Beach, Ocean Ridge, Briny Breezes, Gulf Stream, Delray Beach, Highland Beach, and Boca Raton; Broward County including: Fort Lauderdale, Hollywood, Pompano Beach, Coral Springs, Pembroke Pines, Miramar, Davie, Plantation, Sunrise, Deerfield Beach, Lauderhill, Weston, Tamarac, Coconut Creek, Margate, Lauderdale Lakes, Oakland Park, Hallandale Beach, Cooper City, Wilton Manors, Lighthouse Point, Parkland, Lauderdale-by-the-Sea, Sea Ranch Lakes, Lazy Lake, Hillsboro Beach, Southwest Ranches, North Lauderdale, Dania Beach; Miami-Dade County including: Miami, Miami Beach, Hialeah, Miami Gardens, Coral Gables, Homestead, Doral, North Miami, Aventura, Kendall, Cutler Bay, Sunny Isles Beach, Key Biscayne, Pinecrest, Surfside, Bal Harbour, North Miami Beach, Palmetto Bay, Miami Springs, Opa-locka, Miami Lakes, Florida City, South Miami, Sweetwater, West Miami, Bay Harbor Islands, Biscayne Park, El Portal, Golden Beach, Hialeah Gardens, Indian Creek, Medley, North Bay Village, and Virginia Gardens; and Okeechobee County including: Okeechobee, Taylor Creek, Cypress Quarters, Fort Drum, and Basinger.
Watch the full video here: Microsoft Security Alert: The Most Dangerous Patch Tuesday Yet.
Let A Faster PC Handle Patch Tuesday for You
If you'd rather not track 1,400 fixes, support deadlines, and emergency VPN patches yourself, that's exactly what A Faster PC does. As a managed services provider (MSP), we look after businesses and home users across Florida's Treasure Coast, Space Coast, and South Florida, and we support clients across the country and internationally. We install patches automatically, verify they actually landed, and catch the forgotten computer before attackers do.
Call 772-878-5978, visit https://www.afasterpc.com/, or Schedule a discovery call to talk with our team. While you're there, grab our free cybersecurity report to see where small businesses get caught most.
