Frequently asked questions about reported Citrix NetScaler zero-day vulnerabilities
2026-10-05T08:52:11Z•f64206259624c4d624e5c888bf07656f2596ce182309f7a344e3131782e54a79
CVE-2026-81963CVE-2026-85880CVE-2026-88771CVE-2026-88772CVE-2026-88779AI securityCISA KEVCitrix NetScalerMicrosoft Patch TuesdayOracle Critical Security Patch UpdateSAMLdenial of serviceexploited in the wildexposure managementpatch managementproof of conceptremote code executionzero-day
What happened
Tenable's September–October 2026 security coverage highlights confirmed in-the-wild exploitation of three Citrix NetScaler vulnerabilities: CVE-2026-88771 and CVE-2026-88772, described as zero-day remote code execution flaws, and CVE-2026-88779, an exploited denial-of-service vulnerability affecting SAML-configured deployments. Citrix released patches for the first two on September 27, 2026 and newer fixed builds for CVE-2026-88779 on October 3. The feed also summarizes large Oracle and Microsoft security updates, including 672 Oracle CVEs and 964 Microsoft CVEs, with Microsoft reporting two 0
Why it matters
A reviewed impact interpretation has not been published for this record.
Evidence and limitations
- Source ID
- tenable_blog
- Record identifier
- f64206259624c4d624e5c888bf07656f2596ce182309f7a344e3131782e54a79
- Enrichment time
- 2026-10-05T08:52:11Z
- AI-assisted enrichment
- Yes
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