Microsoft addressed 10 critical bugs, one under active exploit and another publicly known, in its January Patch Tuesday roundup of fixes. In total it patched 83 vulnerabilities.
The most serious bug is a flaw in Microsoft’s Defender anti-malware software that allows remote attackers to infect targeted systems with executable code. Security experts are warning that Windows users who have not connected to internet recently and received an auto-update, should patch now.
“This bug in the Microsoft Malware Protection Engine may already be patched on your system as the engine auto-updates as needed. However, if your systems are not connected to the internet, you’ll need to manually apply the patch,” wrote Dustin Childs, Trend Micro’s Zero Day Initiative (ZDI) security manager.