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UK Cyber Defence
VulnerabilityAnalyzed

CVE-2014-4123

Microsoft Internet Explorer Privilege Escalation Vulnerability

KEVHIGH 8.8EPSS 47.1%

Does this matter?

Known to be exploited in the wild (CISA KEV, CISA remediation deadline 15 June 2022). Treat as an emergency change: patch or isolate now, then hunt for prior compromise.

Description

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 3.1
8.8 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
EPSS
47.13% probability · 99th percentile
Public exploits
None in Exploit-DB
CISA KEV
Listed 25 May 2022 · due 15 June 2022
Affected
microsoft/internet explorer
Source
secure@microsoft.com
EPSS trend
0%25%50%26 October 2026: 47.13%26 October 202626 October 2026

EPSS 47.1% since 26 October 2026; no change recorded yet. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”. Points are recorded when the score first appears and whenever it moves by a percentage point or more.

CISA notes

Apply updates per vendor instructions. https://nvd.nist.gov/vuln/detail/CVE-2014-4123

Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.