---
id: "CVE-2015-0071"
kind: "vulnerability"
aliases: ["CVE-2015-0071"]
title: "Microsoft Internet Explorer 9 through 11 allows remote attackers to bypass the ASLR protection mechanism via a\u2026"
severity: "medium"
cvss: 6.5
epss: 0.33581
exploited: true
status: "open"
category: "other"
products: [{"name": "Microsoft Internet Explorer", "fixed": [], "affected": "", "ecosystem": "vendor"}, {"name": "microsoft internet explorer", "fixed": [], "affected": "= 9", "ecosystem": "vendor"}, {"name": "microsoft internet explorer", "fixed": [], "affected": "= 10", "ecosystem": "vendor"}, {"name": "microsoft internet explorer", "fixed": [], "affected": "= 11", "ecosystem": "vendor"}]
ecosystems: ["vendor"]
tags: ["browsers", "exploited", "internet-explorer", "other", "windows"]
not_affected_if: ["ie-patched", "no-ie-installed"]
published_at: "2015-02-11T03:01:12+00:00"
first_seen_at: "2026-10-23T19:11:52+00:00"
updated_at: "2026-10-23T22:29:04+00:00"
sources: [{"source": "kev", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2015-0071", "first_seen_at": "2026-10-23T19:11:52+00:00"}, {"source": "epss", "url": "https://api.first.org/data/v1/epss?cve=CVE-2015-0071", "first_seen_at": "2026-10-23T19:13:45+00:00"}, {"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2015-0071", "first_seen_at": "2026-10-23T22:29:04+00:00"}]
---

# Microsoft Internet Explorer 9 through 11 allows remote attackers to bypass the ASLR protection mechanism via a…

Microsoft Internet Explorer lets a remote attacker defeat ASLR, a memory randomization defense, by serving a crafted web page. CISA lists it as actively exploited, and it is typically used as a step that makes other memory-corruption exploits reliable.

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

## Affected

- vendor:Microsoft Internet Explorer affected ? fixed ?
- vendor:microsoft internet explorer affected = 9 fixed ?
- vendor:microsoft internet explorer affected = 10 fixed ?
- vendor:microsoft internet explorer affected = 11 fixed ?

## How to check

Check whether Internet Explorer is installed and which version: run 'reg query "HKLM\SOFTWARE\Microsoft\Internet Explorer" /v svcVersion' or check Help > About Internet Explorer.

## Fix

Apply the Microsoft security update for Internet Explorer per vendor instructions (CISA KEV required action); the specific patch number is unknown from the sources.
Upgrade to a supported browser such as Microsoft Edge or a current Chromium/Firefox build, since IE is out of support.

## Timeline

- 2026-10-23T19:11:52+00:00 kev https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2015-0071
- 2026-10-23T19:13:45+00:00 epss https://api.first.org/data/v1/epss?cve=CVE-2015-0071
- 2026-10-23T22:29:04+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2015-0071

## From the sources

Microsoft Internet Explorer allows remote attackers to bypass the address space layout randomization (ASLR) protection mechanism via a crafted web site.

CISA required action: Apply updates per vendor instructions.

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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_