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HIGH · CVSS 8.8 CISA Known Exploited Vulnerability

CVE-2013-3163

Microsoft Internet Explorer Memory Corruption Vulnerability

Microsoft Internet Explorer

Microsoft Internet Explorer 8 through 10 allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption) via a crafted web site, aka "Internet Explorer Memory Corruption Vulnerability," a different vulnerability than CVE-2013-3144 and CVE-2013-3151.

CVSS
8.8
HIGH
EPSS
70.7%
30-day exploitation
Ransomware groups
0
recorded exploiting
Published
10 Jul 2013
CWE-787

Exploitation status

CISA Known Exploited Vulnerabilities

Listed by CISA on 30 March 2023. US federal agencies were required to remediate it by 20 April 2023.

EPSS — exploitation probability

FIRST puts the probability of exploitation activity in the next 30 days at 70.7%, which is higher than 99.4% 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-2013-3163 being exploited by ransomware groups?

No ransomware group in this database is currently recorded as exploiting CVE-2013-3163.

What does CVE-2013-3163 affect?

CVE-2013-3163 affects Microsoft Internet Explorer. Microsoft Internet Explorer 8 through 10 allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption) via a crafted web site, aka "Internet Explorer Memory Corruption Vulnerability," a different vulnerability than CVE-2013-3144 and CVE-2013-3151.

How severe is CVE-2013-3163?

CVE-2013-3163 is rated HIGH with a CVSS base score of 8.8. EPSS puts the probability of exploitation in the next 30 days at 70.7%, higher than 99.4% of all scored vulnerabilities. It is listed in the CISA Known Exploited Vulnerabilities catalog, with a federal remediation deadline of 20 April 2023.

How should organisations respond to CVE-2013-3163?

Apply the vendor patch for Microsoft Internet Explorer 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.