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HIGH · CVSS 8.8 CISA Known Exploited Vulnerability

CVE-2014-4123

Microsoft Internet Explorer Privilege Escalation Vulnerability

Microsoft Internet Explorer

Microsoft Internet Explorer 7 through 11 allows remote attackers to gain privileges via a crafted web site, aka "Internet Explorer Elevation of Privilege Vulnerability," as exploited in the wild in October 2014, a different vulnerability than CVE-2014-4124.

CVSS
8.8
HIGH
EPSS
47.1%
30-day exploitation
Ransomware groups
0
recorded exploiting
Published
15 Oct 2014
NVD

Exploitation status

CISA Known Exploited Vulnerabilities

Listed by CISA on 25 May 2022. US federal agencies were required to remediate it by 15 June 2022.

EPSS — exploitation probability

FIRST puts the probability of exploitation activity in the next 30 days at 47.1%, which is higher than 98.8% 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-2014-4123 being exploited by ransomware groups?

No ransomware group in this database is currently recorded as exploiting CVE-2014-4123.

What does CVE-2014-4123 affect?

CVE-2014-4123 affects Microsoft Internet Explorer. Microsoft Internet Explorer 7 through 11 allows remote attackers to gain privileges via a crafted web site, aka "Internet Explorer Elevation of Privilege Vulnerability," as exploited in the wild in October 2014, a different vulnerability than CVE-2014-4124.

How severe is CVE-2014-4123?

CVE-2014-4123 is rated HIGH with a CVSS base score of 8.8. EPSS puts the probability of exploitation in the next 30 days at 47.1%, higher than 98.8% of all scored vulnerabilities. It is listed in the CISA Known Exploited Vulnerabilities catalog, with a federal remediation deadline of 15 June 2022.

How should organisations respond to CVE-2014-4123?

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.