Hey there, tech enthusiasts! The latest Patch Tuesday updates from Microsoft have landed, bringing with them a total of over 50 security fixes. While this month’s update may not be as extensive as January’s, it still holds significant importance for Microsoft users due to the inclusion of security fixes for some zero-day vulnerabilities.
Delving into Microsoft’s February Patch Tuesday Security Fixes
Among the numerous security fixes released this month, the spotlight shines on four zero-day vulnerabilities. Two of these vulnerabilities were publicly disclosed but managed to evade active exploitation, while the other two were targeted by attackers despite remaining undisclosed. Here’s a brief rundown of these critical vulnerabilities:
- CVE-2025-21418 (important; CVSS 7.8): This privilege escalation vulnerability in Windows Ancillary Function Driver for WinSock could grant an attacker SYSTEM privileges. Although undisclosed prior to the fix, Microsoft confirmed active exploitation of this flaw.
- CVE-2025-21391 (important; CVSS 7.1): Another privilege escalation vulnerability, this time in Windows Storage, allowed attackers to delete data on the target device. While not leading to information disclosure, this flaw could potentially render the target system inoperable.
- CVE-2025-21194 (important; CVSS 7.1): A security feature bypass in Microsoft Surface that was publicly disclosed but not actively exploited due to its complex nature. Exploiting this flaw required specific conditions to be met, including physical access to the target machine, ultimately leading to compromising the secure kernel and hypervisor.
- CVE-2025-21377 (important; CVSS 6.5): This spoofing vulnerability affecting NTLM Hash Disclosure, although publicly disclosed, was not exploited prior to the patch. By tricking users into interacting with a malicious file, attackers could potentially authenticate as the victim user.
Additional Noteworthy Patches Unveiled by Microsoft
Microsoft also addressed three critical severity vulnerabilities this month, including remote code execution flaws in DHCP Client Service and Windows Lightweight Directory Access Protocol (LDAP), as well as a privilege escalation vulnerability in Microsoft Dynamics 365 Sales. In total, 49 vulnerabilities of important severity and one low severity flaw were patched in this update bundle. It’s crucial for users to stay vigilant and promptly update their devices to mitigate potential threats.
We’d love to hear your thoughts on these latest security updates. Share your insights in the comments below!
