Windows Shell: protection skipped (CVE-2026-21510)

high severity · exploited in the wild · published 2026-02-10

A crafted file can get around a built-in Windows protection, so the user may open it without the usual warning. Attackers already use this flaw in the wild.

Fixed in: 10.0.28000.1575

CVE: CVE-2026-21510

Source: Microsoft (MSRC)

Am I affected?

You are affected if the installed version is older than 10.0.28000.1575. Check the version you have and update to 10.0.28000.1575 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 1577 and your operating system.