---
id: "CVE-2014-4123"
kind: "vulnerability"
aliases: ["CVE-2014-4123"]
title: "Microsoft Internet Explorer: Microsoft Internet Explorer Privilege Escalation Vulnerability"
severity: "high"
cvss: 8.8
epss: 0.47133
exploited: true
status: "open"
category: "infrastructure"
products: [{"name": "Microsoft Internet Explorer", "fixed": [], "affected": "", "ecosystem": "vendor"}]
ecosystems: ["vendor"]
tags: ["exploited", "infrastructure", "internet-explorer", "windows"]
not_affected_if: ["internet-explorer-removed", "patched-windows"]
published_at: "2014-10-15T10:55:08+00:00"
first_seen_at: "2026-10-23T19:11:52+00:00"
updated_at: "2026-10-23T21:57:35+00:00"
sources: [{"source": "kev", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2014-4123", "first_seen_at": "2026-10-23T19:11:52+00:00"}, {"source": "epss", "url": "https://api.first.org/data/v1/epss?cve=CVE-2014-4123", "first_seen_at": "2026-10-23T19:13:45+00:00"}, {"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2014-4123", "first_seen_at": "2026-10-23T21:57:35+00:00"}]
---

# Microsoft Internet Explorer: Microsoft Internet Explorer Privilege Escalation Vulnerability

Microsoft Internet Explorer contains an unspecified flaw that lets a remote attacker gain privileges by luring a user to a crafted web site. It is listed in CISA's Known Exploited Vulnerabilities catalog, so attacks have been observed in the wild.

_Summary, check and fix written by a model from the sources; labelled as such._

## Affected

- vendor:Microsoft Internet Explorer affected ? fixed ?

## Fix

Apply the Microsoft update for this CVE per vendor instructions (CISA required action). Exact KB or patched build: unknown.

## Timeline

- 2026-10-23T19:11:52+00:00 kev https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2014-4123
- 2026-10-23T19:13:45+00:00 epss https://api.first.org/data/v1/epss?cve=CVE-2014-4123
- 2026-10-23T21:57:35+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2014-4123

## From the sources

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.

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_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_