Microsoft patches actively exploited February flaws
IPA warns six Microsoft vulnerabilities patched in the February 2026 update are already being exploited in the wild and urges immediate patching.
Sourceipa.go.jp — open the original
What to check
- Applies to
- The 6 CVEs named below. Whether you run an affected version is not assessed: check the versions the source lists.
- Exploitation
- CISA lists CVE-2026-21510, CVE-2026-21513, CVE-2026-21514, CVE-2026-21519, CVE-2026-21525, and CVE-2026-21533 as exploited in the wild.
Japan's IPA issued an alert following Microsoft's February 2026 Patch Tuesday release, highlighting six vulnerabilities—CVE-2026-21510, CVE-2026-21513, CVE-2026-21514, CVE-2026-21519, CVE-2026-21525, and CVE-2026-21533—that Microsoft has confirmed are being actively exploited. The advisory does not specify affected products beyond generic Microsoft software, nor does it detail the exploitation techniques or attacker identities, but it stresses that successful exploitation could allow application crashes or full attacker control of affected systems.
IPA recommends organizations and individual users apply the security updates immediately via Windows Update or through managed patch deployment processes, noting that a reboot may be required. As details on exploitation vectors, threat actors, and specific attack campaigns are not disclosed in this bulletin, this alert should be treated as an urgent patch reminder rather than a full technical disclosure.
Mentioned in this report
Source reporting: https://www.ipa.go.jp/security/security-alert/2025/0212-ms.html
Free public brief. Slack alerts on the vendors you run come with the paid plans, and a new account gets three days of them, no card.
What this brief leaves out
This page is the free tier: the write-up, the severity, the names. In the app the same report carries live profiles of the CVEs it names. The paid plans add the security research and news reporting the free tier leaves out.
It sits in a corpus of 16,433 reports from 149 sources, 661 of them written in the last seven days, and it grows through the day.
A new account starts with three days of all of it, no card, then keeps the government and CERT reporting free. Slack alerts are a paid-plan feature: name the vendors you run and Slack hears about the reports that touch them, not the rest of the week's. Nothing is charged unless you subscribe.
Create a free account What it costs