Citrix NetScaler ↗
Summary iPlain-English security verdict for Citrix NetScaler, generated from its current health score, actively-exploited vulnerabilities, and latest supported version.
Citrix NetScaler currently scores 8/100 — critical, with active exploitation. 1 of its known vulnerability is being actively exploited in the wild (CISA KEV), including CVE-2023-4966. Upgrade immediately and review your exposure to the actively-exploited CVEs below.
Disclosure trend iNew CVEs published for Citrix NetScaler each year (NVD). A higher bar means more disclosures that year — more scrutiny, not necessarily less safe.
1 of its known vulnerability is linked to ransomware campaigns (CISA KEV).
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-2023-4966 CRITICAL exploited ransomware Memory corruption EPSS 100% → fixed in 14.1-8.50 CVE-2026-8452 CRITICAL Memory corruption EPSS 0% → fixed in 14.1-72.61 CVE-2026-8655 CRITICAL Memory corruption EPSS 0% → fixed in 14.1-72.61Get alerted about Citrix NetScaler
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Frequently asked
Is Citrix NetScaler safe and patched?
Citrix NetScaler currently scores 8/100 — critical, with active exploitation. 1 of its known vulnerability is being actively exploited in the wild (CISA KEV), including CVE-2023-4966. Upgrade immediately and review your exposure to the actively-exploited CVEs below.
What should I do about Citrix NetScaler now?
Review the patch-priority list, apply the available fixes (or move to the latest release), and confirm against Citrix's official advisory. Some issues are under active exploitation, so treat this as urgent.
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 Citrix's official advisory before you patch or upgrade — Citrix NetScaler official site ↗