Rumors mount that a major bug could be disclosed on the day Microsoft ends support for Windows 7

Security researcher Brian Krebs is warning that a particularly nasty bug may be patched on Tuesday, January 14—the day that support for Windows 7 is expected to expire.

If that’s true, then potentially millions of Windows users could be exposed to the malware, which Krebs is reporting could involve crypt32.dll, which controls “certificate and cryptographic messaging functions in the CryptoAPI.” Here’s what’s scary, Krebs reports: A flaw in the crypt32.dll could be used to spoof the digital signature of a piece of software, creating the possibility that your PC could allow in a piece of malware posing as a perfectly legitimate application.

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