Two newly disclosed security vulnerabilities could put business websites and sensitive information at risk. Here’s what you need to know and what you should do.
On October 21, 2026, two serious security vulnerabilities were publicly disclosed that could potentially allow hackers to gain unauthorized access to websites and computer systems.
The vulnerabilities affect certain systems that use PHP, a popular technology that powers millions of websites and online applications.
The good news? Security updates are available. However, businesses need to make sure those updates are installed.
What Is PHP, and Why Should You Care?
You probably haven’t heard of PHP, but there’s a good chance your business relies on it.
PHP is software that runs behind the scenes on many websites. It’s commonly used for everything from customer portals and online stores to websites built with platforms such as WordPress.
Think of PHP as part of the engine that keeps your website running. You don’t normally see it, but it’s essential to how many websites work.
When a serious security flaw is discovered in that engine, hackers may be able to take advantage of it.
What’s the Security Risk?
Two vulnerabilities, identified as CVE-2026-109618 and CVE-2026-109619, have been rated Critical, with a severity score of 9.2 out of 10.
Under certain circumstances, these flaws could allow hackers to:
- Gain unauthorized access to vulnerable servers.
- Install malicious software.
- Steal sensitive business or customer information.
- Disrupt websites and online services.
- Potentially take control of affected systems.
What makes these vulnerabilities particularly concerning is that an attacker may not need a username, password, or any action from an employee to exploit them.
In other words, simply having a vulnerable system accessible from the internet could create a security risk.
Does This Affect Your Business?
If your company has a website, online store, customer portal, or custom web application, it’s worth checking whether PHP is being used.
Businesses that rely on WordPress or other PHP-based platforms should pay particular attention.
Using PHP doesn’t automatically mean your website is vulnerable. The risk depends on the version installed and how your website or application is configured.
Even if another company manages your website, it’s important to verify that the necessary security updates have been applied.
What Should You Do Right Now?
You don’t need to be a technology expert to take action. Here are four practical steps:
1. Contact your website provider or IT team.
Ask whether your website or business applications use PHP and whether they’re affected by these newly disclosed vulnerabilities.
2. Make sure security updates are installed.
Updated PHP versions are available to address these vulnerabilities. Your IT provider should determine which version is appropriate for your systems and verify that the update was successful.
3. Check with outside vendors.
If another company hosts your website, manages your online store, or provides a web-based business application, ask whether they’ve reviewed and addressed the issue.
4. Watch for unusual activity.
Unexpected website changes, suspicious account activity, or unexplained system problems could indicate a security issue. Your IT provider should review available security logs and alerts.
Why Waiting Isn’t a Good Idea
Cybercriminals often move quickly when serious security vulnerabilities become public.
Once details of a vulnerability are disclosed, attackers may begin searching the internet for systems that haven’t been updated.
Temporary security measures may reduce some risks, but they aren’t a substitute for installing the appropriate updates.
The best protection is to make sure affected systems are properly patched.
How MC Services Can Help
At MC Services, we understand that most business owners don’t have the time or technical expertise to track every new cybersecurity threat.
That’s why having a proactive IT and cybersecurity partner matters.
Our team helps businesses identify potential security risks, manage software updates, monitor systems for suspicious activity, and protect critical business information.
If you’re unsure whether your website or business systems are affected by these vulnerabilities, MC Services can help you determine your exposure and identify the next steps.
Don’t wait until a security vulnerability becomes a business emergency.
Contact MC Services at www.mcservices.com to learn how we can help protect your business.
MC Services | Managed IT Services & Cybersecurity Solutions
Security Advisory: October 22, 2026
