Microsoft is planning to issue 12 fixes in next week's Patch Tuesday monthly security update — the most since last summer.
At least five zero-day vulnerabilities exist in the popular application, four in Word and one in Excel. Three of the Word flaws were discovered in December, and Microsoft has confirmed that at least two of them have been exploited in limited and targeted attacks.
Many security researchers expected Microsoft to already have patched the vulnerabilities, either in January’s security update or with an out-of-cycle fix.
Meanwhile, a fourth Word bug came to light in late January and now is being used in limited attacks. And last Friday, the company reported zero-day exploits targeting a flaw in Excel.
Tuesday’s security update also is expected to include five fixes for Windows flaws, with at least one being critical. Interestingly, there also are patches planned for flaws in Windows Live OneCare, Microsoft Antigen, Windows Defender and ForeFront — programs designed to safeguard users from malware.
Additionally, Microsoft plans to correct vulnerabilities in the Step-by-Step Interactive Training application and Microsoft Data Access Components technology.
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