CVE-2026-21522

CVE

Threat entity extracted from intelligence sources

Frequency

occurrences

First Seen

February 10, 2026

Last Seen

February 11, 2026

API

Exploited in Wild

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Ransomware Use

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Public Exploits

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Attack Vector

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Vulnerability Overview

Exploitation Activity

Exploitation Intelligence

Critical Windows Shell Zero-Day Vulnerability Exploited23.9

Microsoft has released updates to address a critical zero-day vulnerability in Windows Shell, tracked as CVE-2026-21510, which is actively being exploited. This security flaw allows remote attackers to bypass essential protection mechanisms, affecting millions of Windows users. The vulnerability was...

February 2026 Patch Tuesday Addresses Multiple Vulnerabilities18.4

On February 10, 2026, Adobe and Microsoft released security patches addressing numerous vulnerabilities, including 36 CVEs published on the same day. Notably, three CVEs (CVE-2026-21510, CVE-2026-21514, and CVE-2026-21519) were added to the CISA Known Exploited Vulnerabilities (KEV) list due to acti...