Vulnerability Details Summary Title: Microsoft Office Excel calculatedColumnFormula Use-After-Free Information Disclosure Vulnerability IDs: - ZDI-15-517 - ZDI-CAN-3014 - CVE-2015-2555 Severity CVSS Score: 6.8 - Affected Entities Vendor: Microsoft Products: Office Description This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Microsoft Office Excel. A specially crafted calculatedColumnFormula object can cause Excel to load information from memory after it has been freed. An attacker can leverage this vulnerability to execute arbitrary code under the context of the current process. Timeline Reported to Vendor: 2015-07-09 Public Release: 2015-10-13 Additional Details Microsoft has issued an update to correct this vulnerability. More details can be found at: https://technet.microsoft.com/en-us/library/security/MS15-110 Credit Discoverer: 3S Labs