CVE-2015-1770
Microsoft Office Uninitialized Memory Use Vulnerability
Microsoft Office
Microsoft Office 2013 SP1 and 2013 RT SP1 allows remote attackers to execute arbitrary code via a crafted Office document, aka "Microsoft Office Uninitialized Memory Use Vulnerability."
Exploitation status
CISA Known Exploited Vulnerabilities
Listed by CISA on 28 March 2022. US federal agencies were required to remediate it by 18 April 2022.
EPSS — exploitation probability
FIRST puts the probability of exploitation activity in the next 30 days at 35%, which is higher than 98.4% of all scored vulnerabilities. EPSS is a forecast of activity, not a measure of severity, and it is rescored daily.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Frequently asked questions
Is CVE-2015-1770 being exploited by ransomware groups?
No ransomware group in this database is currently recorded as exploiting CVE-2015-1770.
What does CVE-2015-1770 affect?
CVE-2015-1770 affects Microsoft Office. Microsoft Office 2013 SP1 and 2013 RT SP1 allows remote attackers to execute arbitrary code via a crafted Office document, aka "Microsoft Office Uninitialized Memory Use Vulnerability."
How severe is CVE-2015-1770?
CVE-2015-1770 is rated HIGH with a CVSS base score of 8.8. EPSS puts the probability of exploitation in the next 30 days at 35%, higher than 98.4% of all scored vulnerabilities. It is listed in the CISA Known Exploited Vulnerabilities catalog, with a federal remediation deadline of 18 April 2022.
How should organisations respond to CVE-2015-1770?
Apply the vendor patch for Microsoft Office as the first priority, and treat any internet-facing instance as the most urgent. Because this vulnerability is associated with ransomware activity, also review whether the affected systems were reachable before patching, rather than assuming that patching alone closes the incident.