Outlook ↗
Auto-added after CISA flagged Outlook 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 Outlook, generated from its current health score, actively-exploited vulnerabilities, and latest supported version.
Outlook currently scores 20/100 — critical, with active exploitation. 1 of its known vulnerability is being actively exploited in the wild (CISA KEV), including CVE-2023-35311. Upgrade immediately and review your exposure to the actively-exploited CVEs below.
Disclosure trend iNew CVEs published for Outlook 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.
Most urgent first — actively exploited, then likeliest to be exploited.
CVE-2023-35311 HIGH exploited CWE-367 EPSS 16% → see advisoryGet alerted about Outlook
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Frequently asked
Is Outlook safe and patched?
Outlook currently scores 20/100 — critical, with active exploitation. 1 of its known vulnerability is being actively exploited in the wild (CISA KEV), including CVE-2023-35311. Upgrade immediately and review your exposure to the actively-exploited CVEs below.
What should I do about Outlook now?
Review the patch-priority list, apply the available fixes (or move to the latest release), and confirm against Microsoft's official advisory. Some issues are under active exploitation, so treat this as urgent.
Why is Outlook listed on IsItPatched?
Outlook 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 Outlook been actively exploited?
Yes. CISA added Outlook to its Known Exploited Vulnerabilities (KEV) catalog after confirming exploitation in the wild — the triggering vulnerability is CVE-2023-35311. Make sure you are running a patched, supported version of Outlook 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 — Outlook official site ↗