Summary iPlain-English security verdict for Xen, generated from its current health score, actively-exploited vulnerabilities, and latest supported version.
Xen currently scores 8/100 — critical. No tracked vulnerabilities are currently known to be exploited in the wild. Upgrade promptly to address the open critical vulnerabilities.
Disclosure trend iNew CVEs published for Xen 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-2025-27466 CRITICAL CWE-395 EPSS 0% → fixed in 4.17.0 CVE-2025-58142 CRITICAL CWE-395 EPSS 0% → fixed in 4.17.0 CVE-2025-58143 CRITICAL CWE-366 EPSS 0% → fixed in 4.17.0Get alerted about Xen
Be emailed the moment Xen gets a newly exploited vulnerability (CISA KEV) or a release reaches end of life. Free · double opt-in · unsubscribe anytime.
We email only on real events for Xen — no marketing, no sharing, and we never know what you run. Track your whole stack →
Frequently asked
Is Xen safe and patched?
Xen currently scores 8/100 — critical. No tracked vulnerabilities are currently known to be exploited in the wild. Upgrade promptly to address the open critical vulnerabilities.
What should I do about Xen now?
Review the patch-priority list, apply the available fixes (or move to the latest release), and confirm against Xen Project's official advisory.
Similar software we track
Other Virtualization products — compare their security status.
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 Xen Project's official advisory before you patch or upgrade — Xen official site ↗