Microsoft has released its latest round of security updates, addressing 57 vulnerabilities, including six critical zero-day threats that hackers are actively exploiting. If you run a small business, staying on top of these security patches is crucial to protecting your data and operations.
What’s in the Latest Update?
- 6 Critical security flaws
- 50 Important vulnerabilities
- 1 Low severity issue
- 23 Remote code execution (RCE) risks
- 22 Privilege escalation threats
Microsoft also patched 17 additional vulnerabilities in its Edge browser, including a spoofing issue (CVE-2025-26643, CVSS score: 5.4).
The 6 Zero-Day Threats You Need to Know About
Zero-day vulnerabilities are security flaws that cybercriminals discover and exploit before a fix is available. Here are the six Microsoft just patched:
- CVE-2025-24983 (CVSS 7.0): Hackers can exploit this flaw in Windows to gain elevated access to your system.
- CVE-2025-24984 (CVSS 4.6): Attackers with physical access could use a USB device to steal sensitive data.
- CVE-2025-24985 (CVSS 7.8): A weakness in the Windows file system that lets hackers execute harmful code.
- CVE-2025-24991 (CVSS 5.5): A flaw that allows unauthorized access to certain system data.
- CVE-2025-24993 (CVSS 7.8): Another Windows file system issue that can be used for cyberattacks.
- CVE-2025-26633 (CVSS 7.0): A security bypass vulnerability that allows attackers to manipulate system files.
Why Should Small Businesses Care?
Small businesses are prime targets for cybercriminals, especially when security updates are ignored. Attackers often exploit vulnerabilities to:
- Steal customer data
- Deploy ransomware
- Hijack business systems
- Use your network to attack others
Hackers have already used one of these vulnerabilities to install PipeMagic, a dangerous trojan disguised as a legitimate OpenAI ChatGPT app. It has primarily targeted companies in Asia and Saudi Arabia, but small businesses worldwide should be on high alert.
How Hackers Use These Vulnerabilities
Security experts warn that hackers could chain multiple vulnerabilities together to carry out more sophisticated attacks. For example, cybercriminals could:
- Trick employees into opening malicious Virtual Hard Disk (VHD) files, giving hackers access to your system.
- Use phishing emails with fake Microsoft updates to distribute malware.
- Exploit weak security settings to gain control over business networks.
What You Need to Do
- Update your systems immediately. Run Windows updates and make sure all devices are patched.
- Train employees to recognize phishing attempts. Many cyberattacks start with a simple fake email.
- Use strong security software. Ensure your business has firewalls, antivirus programs, and endpoint protection in place.
- Back up critical data. Keep secure backups so your business can recover in case of an attack.
- Limit user permissions. Only allow employees access to the data and tools they need.
Microsoft’s Security Warning to Businesses
The U.S. Cybersecurity and Infrastructure Security Agency (CISA) has added these vulnerabilities to its Known Exploited Vulnerabilities (KEV) catalog. This means government agencies are required to patch them by April 1, 2025—a strong indicator that small businesses should act quickly too.
Final Thoughts
Cybersecurity threats are not just an issue for large corporations—small businesses are frequently targeted because they often lack the resources to defend against attacks. By staying proactive, updating your systems, and training your team, you can significantly reduce your risk.
At CybrogenIT, we help small businesses stay secure against emerging cyber threats. If you need guidance on how to protect your business, contact us today.