CVE-2026-21218

CVE

Threat entity extracted from intelligence sources

Frequency

occurrences

First Seen

February 10, 2026

Last Seen

February 12, 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 .NET Bypass Vulnerability in Ubuntu 25.10 and 22.04 LTS51.1

A critical security flaw has been identified in the .NET framework affecting Ubuntu 25.10 and 22.04 LTS. Discovered by Kevin Jones, the vulnerability in the System.Security.Cryptography.Cose component allows attackers to bypass security checks, potentially leading to unauthorized access or data mani...

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...