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Critical MSRC-CVE-2021-26435 1 CVE

Windows Scripting Engine Memory Corruption Vulnerability

Published Sep 14, 2021 · Updated Sep 23, 2021 · Revision 2

Vendor: Microsoft

Summary

Impact: Remote Code Execution. Microsoft rating: Critical. Not known to be exploited — Exploitation Less Likely. Customer action: Required.

Details

According to the CVSS metric, user interaction is required (UI:R). What interaction would the user have to do?
Exploitation of the vulnerability requires that a user open a specially crafted file.
In an email attack scenario, an attacker could exploit the vulnerability by sending the specially crafted file to the user and convincing the user to open the file., In a web-based attack scenario, an attacker could host a website (or leverage a compromised website that accepts or hosts user-provided content) containing a specially crafted file designed to exploit the vulnerability.
An attacker would have no way to force users to visit the website. Instead, an attacker would have to convince users to click a link, typically by way of an enticement in an email or instant message, and then convince them to open the specially crafted file.

Security updates
10.0.17763.2183 — https://support.microsoft.com/help/5005568
10.0.18363.1801 — https://support.microsoft.com/help/5005566
10.0.19043.1237 — https://support.microsoft.com/help/5005565
10.0.20348.230 — https://support.microsoft.com/help/5005575
10.0.10240.19060 — https://support.microsoft.com/help/5005569
10.0.14393.4651 — https://support.microsoft.com/help/5005573
6.1.7601.25712 — https://support.microsoft.com/help/5005633
6.1.7601.25712 — https://support.microsoft.com/help/5005615
6.3.9600.20120 — https://support.microsoft.com/help/5005613
6.3.9600.20120 — https://support.microsoft.com/help/5005627
6.0.6003.21218 — https://support.microsoft.com/help/5005606
6.2.9200.23462 — https://support.microsoft.com/help/5005623
6.2.9200.23462 — https://support.microsoft.com/help/5005607

Vulnerabilities 1

Revision history

  1. #2

    For all CVEs affecting Windows that were released on September 14, 2021: 1) In the Security Updates table, the Build Numbers for KB KB5005565 have been corrected for all affected editions of the following versions of Windows 10: Windows 10, version 2004, all editions; Windows Server, version 2004 (Server Core installation); Windows 10, version 20H2; Windows Server, version 20H2 (Server Core Installation); Windows 10, version 21H1. 2) For CVEs where Windows Server 2022 is affected the links have been updated to point to information related to [5005575](https://support.microsoft.com/en-us/help/5005575). Customers whose Windows devices are configured to receive automatic updates do not need to take any further action.

  2. #1

    Information published.

References