Security Alert, Week of October 27, 2026: Actively Exploited Flaws to Patch
Which security flaws are being actively exploited this week?
In the week to October 27, 2026, the U.S. Cybersecurity and Infrastructure Security Agency added 1 vulnerability in products small businesses commonly use to its list of flaws attackers are actively exploiting, affecting Website, online store and file-transfer software. If you run any of them, apply the vendor’s update this week.
What are the actively exploited flaws, and who is affected?
CISA’s Known Exploited Vulnerabilities catalog lists flaws with confirmed attacks in the wild. These are the additions from the past seven days in products a small business is likely to run:
| Product | Flaw | Added |
|---|---|---|
| Adobe Commerce and Magento | Adobe Commerce and Magento Unrestricted Upload of File with Dangerous Type Vulnerability (CVE-2026-48356). | 2026-10-27 |
Does this affect my business?
- Website, online store and file-transfer software: If you or your web host run this software, ask them to confirm it is patched.
Which Microsoft deadlines are coming up?
- OneDrive and SharePoint sharing, mid-October to the end of November. Outside people opening older links you shared with them will get “access denied” until they have a guest account. The one-step fix.
- Copier scan to email, end of December. Microsoft 365 switches off the password sign-in most copiers use to send scans. How to check your copier and four fixes.
What should a small business do this week?
- Confirm updates installed on every PC, including laptops that are rarely in the office.
- Restart computers and browsers so pending updates finish.
- Check your firewall and VPN firmware against the vendor’s latest version.
- Make sure multi-factor authentication is on for email and remote access, so a single exploited flaw or stolen password is not enough.
- Know when your backup was last restored from, not just whether it ran.
For the businesses we manage, this is handled centrally: updates are pushed and verified overnight. More on how that works: managed endpoint protection and patching, network security, the Windows 11 24H2 end-of-support deadline.
Catch up with the previous alert, Security Alert, Week of October 20, 2026: Actively Exploited Flaws to Patch, or all weekly security alerts.
Want This Handled for You?
iTech Plus provides managed IT and cybersecurity for small businesses and medical practices across Polk County, including Lakeland, Winter Haven, Davenport and Haines City. If you are not sure your computers and firewall are patched, we offer a free IT assessment with a written report. Call (321) 221-7117 or email info@itechplus.co.
