As BleepingComputer reports, security flaws were found in the following categories: 25 elevation-of-privilege vulnerabilities, five security feature bypass vulnerabilities, 12 remote code-execution vulnerabilities, six information disclosure vulnerabilities, three denial of service vulnerabilities, and seven spoofing vulnerabilities. Three of the elevation of privilege vulnerabilities and two of the information disclosure vulnerabilities are considered "critical." (These numbers do not include the three Microsoft Edge vulnerabilities patched earlier in February.)
Six zero-days patched in February
Three of the six actively exploited zero-days fixed in February are security feature bypass vulnerabilities:
CVE-2026-21513: This MSHTML Framework vulnerability allows an unauthorized attacker to bypass a security feature over a network. Microsoft has not released details on how this flaw was exploited.
All three of the above flaws have been attributed to Microsoft Threat Intelligence Center (MSTIC), Microsoft Security Response Center (MSRC), Office Product Group Security Team, and Google Threat Intelligence Group along with an anonymous researcher for CVE-2026-21510 and CVE-2026-21514.
Finally, CVE-2026-21525 is a denial of service vulnerability in the Windows Remote Access Connection Manager that allows an unauthorized attacker to deny service locally. This flaw was discovered by the ACROS Security team with 0patch—it was reportedly found in a public malware repository in December 2025.
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