Microsoft Released January 2026 Software Updates
Microsoft has released software updates as part of its January 2026 Patch Tuesday. The updates fix 114 security vulnerabilities in total, including 3 zero-day vulnerabilities, 1 of which is being actively exploited.
The breakdown of the vulnerabilities are as follows:
57 privilege escalation
3 security feature bypass
22 remote code execution
22 information disclosure
2 denial of service
5 spoofing
The actively exploited zero-day is as follows:
CVE-2026-20805 - vulnerability in Desktop Window Manager that can lead to information disclosure
Why You Should Care?
Zero-day vulnerabilities are vulnerabilities where a flaw has been identified but there was no fix for the flaw, which means attackers will try to exploit as many targets as possible before users fix the vulnerability. This makes it extra dangerous, and needs to be addressed as soon as possible.
In this case, one of the zero-day vulnerabilities is actively exploited, which means attackers are already attacking businesses. It is only a matter of time before the attackers compromise your business. Now that patches are available, it is critical to apply the patches as soon as possible to avoid getting compromised.
What Should You Do?
Test the patches ASAP at your organization, and make sure it does not break any business applications
Prioritize patching the zero-day vulnerabilities
Roll out the rest of the Patch Tuesday updates
References
https://www.bleepingcomputer.com/news/microsoft/microsoft-january-2026-patch-tuesday-fixes-3-zero-days-114-flaws/