Two critical vulnerabilities are being actively exploited right now — and if your team uses Chrome or Microsoft Defender, you could already be breached.
What Happened
Google issued an emergency patch for CVE-2026-5281, a Chrome zero-day that’s actively being used in attacks. This is the fourth Chrome zero-day Google has patched in 2026 alone. If your browsers aren’t updated, a visit to the wrong website could drop ransomware onto someone’s laptop.
Around the same time, Microsoft confirmed that CVE-2026-33825, a privilege escalation flaw in Microsoft Defender, was also being exploited in the wild. Hackers used publicly available code to bypass antivirus protections and gain higher-level access to systems.
Neither vulnerability required user interaction beyond visiting a site or opening a file. That’s the scary part.
Why This Matters for Your Business
Most SMBs think attackers target them through phishing emails or stolen passwords. That’s still true. But attackers are increasingly using client-side exploits — compromise the browser, compromise the endpoint, own the network.
Your team browses the web every day. One unpatched browser version is all it takes.
What You Should Do Right Now
- Force-update Chrome on every workstation. Not “when convenient” — now. Open Chrome → Menu → Help → About Chrome. If it doesn’t say updated, something is wrong.
- Check your Microsoft Defender status. Microsoft patched CVE-2026-33825 on April 14. If your patching cycles are monthly or quarterly, those machines were exposed for weeks.
- Audit your patch cadence. If you don’t have automated patching with same-day or next-day deployment for critical CVEs, that’s the gap attackers are looking for.
The Bigger Picture
This isn’t isolated. Microsoft patched 79 vulnerabilities in March. Google is on its fourth zero-day. The pace of exploitation is accelerating.
If you’re managing IT yourself or relying on a break-fix relationship, you’re already behind. Proactive patch management, endpoint monitoring, and layered defenses aren’t luxuries — they’re the baseline.
Ready to lock down your endpoints before the next one hits? Talk to NSI Tech — we’ll run a free security assessment and show you exactly where you’re exposed.