Windows Scripting Engine memory corruption (CVE-2021-34448)

medium severity · exploited in the wild · published 2021-07-13

Attackers exploit this memory corruption in the wild to run arbitrary code on the machine. A successful attack gives them full control of the affected Windows system.

Fixed in: 10.0.19043.1110

CVE: CVE-2021-34448

Source: Microsoft (MSRC)

Am I affected?

You are affected if the installed version is older than 10.0.19043.1110. Check the version you have and update to 10.0.19043.1110 or later. The fixed version is verified against a vendor or advisory source.

Get the fix

FixLane has a reviewed fix procedure for this incident: a read-only check first, then the fix. Ask the Telegram bot, or connect an AI agent to the FixLane MCP server and call get_fix_prompt with incident id 1458 and your operating system.