Defender
Auto-added after CISA flagged Defender as actively exploited (KEV catalog). Version and lifecycle mapping is pending review, so this is assessed at the product level and is never reported as a confident "healthy".
Summary iPlain-English security verdict for Defender, generated from its current health score, actively-exploited vulnerabilities, and latest supported version.
Defender currently scores 84/100 — good. No tracked vulnerabilities are currently known to be exploited in the wild. It's largely safe; apply minor updates as they appear.
The known vulnerabilities
IsItPatched tracks 2 known vulnerabilities in Microsoft Defender disclosed between 2020 and 2023. CVE-2023-38175 is a high-severity vulnerability (CVSS 7.8). CVE-2020-1002 is a high-severity vulnerability (CVSS 7.1). Apply Microsoft's latest security update for Defender to stay protected.
Disclosure trend iNew CVEs published for Defender each year (NVD). A higher bar means more disclosures that year — more scrutiny, not necessarily less safe.
Patch priority — what to act on iThe issues to fix first — actively exploited (CISA KEV) first, then by exploitation probability (EPSS), then severity. Each row's "→ fixed in" is the earliest version that patches it; "see advisory" means no fixed version is published.
No urgent unpatched issues identified. ✓
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Frequently asked
Is Defender safe and patched?
Defender currently scores 84/100 — good. No tracked vulnerabilities are currently known to be exploited in the wild. It's largely safe; apply minor updates as they appear.
What should I do about Defender now?
Review the patch-priority list, apply the available fixes (or move to the latest release), and confirm against Microsoft's official advisory.
Why is Defender listed on IsItPatched?
Defender was added automatically because CISA's Known Exploited Vulnerabilities (KEV) catalog flagged it as actively exploited in the wild. IsItPatched tracks its known CVEs, severity (CVSS), exploitation probability (EPSS) and KEV status from public data; its version and lifecycle mapping is verified over time.
Has Defender been actively exploited?
Yes. CISA added Defender to its Known Exploited Vulnerabilities (KEV) catalog after confirming exploitation in the wild — the triggering vulnerability is CVE-2026-41091. Make sure you are running a patched, supported version of Defender and confirm it against Microsoft's security advisory.
Similar software we track
More from Microsoft tracked on IsItPatched.
lifecycle unknown — needs latest supported version
Informational only, from public data (NVD · CISA KEV · EPSS · endoflife.date), and can lag or miss vendor-specific fixes. Always confirm against Microsoft's official advisory before you patch or upgrade.