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SPOJENO PŘES CVE Defending Against Active Exploitation of Citrix NetScaler ADC and Gateway Appliances

Introduction In late September 2026, Mandiant Consulting and Google Threat Intelligence Group (GTIG) identified active, in-the-wild exploitation of a zero-day vulnerability (CVE-2026-88772) affecting Citrix NetScaler ADC and NetScaler Gateway appliances. We have observed evidence that organizations in North America and Europe in the government, financial services, education, legal and professional services sectors were likely impacted by this exploitation campaign, which has been ongoing since…

KEV ✓ EPSS 0.01 CVSS 9.5 CVE-2026-88771 CVE-2026-88772 Citrix NetScaler veřejná správa finance školství US HU GB FR IT SE

tg: varování tg: zneužíváno tg: zranitelnost tg: rozbor tp: malware tp: identita

· Mandiant / Google TI · Defending Against Active Exploitation of Citrix NetScaler ADC and Gateway Appliances · Palo Alto Unit 42 · Threat Brief: NetScaler Zero Days CVE-2026-88771 and CVE-2026-88772 Exploited in the Wild · NKI Maďarsko · Riasztás a NetScaler ADC és NetScaler Gateway termékeket érintő sérülékenységekről · zachyceno · Sophos Threat Research · Citrix NetScaler vulnerabilities (CVE-2026-88771, CVE-2026-88772) in active exploitation · zachyceno · CERT-FR – alerty · Multiples vulnérabilités dans Citrix NetScaler ADC et Gateway (28 septembre 2026) · CSIRT Itálie (ACN) · Vulnerabilità in prodotti Citrix NetScaler · CERT-SE · Kritiska sårbarheter i Citrix NetScaler ADC and Citrix NetScaler Gateway

SPOJENO PŘES CVE Citrix admins warned to shut down NetScalers over 2 exploited zero-days

Two unpatched Citrix NetScaler zero-day vulnerabilities are reportedly being exploited in attacks, with cybersecurity agencies, security researchers, and IT providers privately warning organizations about the flaws ahead of patches expected next week. [...]

KEV ✓ EPSS 0.23 CVSS 9.3 CVE-2026-19489 CVE-2026-19490 Citrix US CA IT NL FI FR

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· BleepingComputer · Citrix admins warned to shut down NetScalers over 2 exploited zero-days · Cyber Centre Kanada · AL26-019 - Vulnerabilities impacting Citrix NetScaler ADC and NetScaler Gateway - CVE-2026-19490 and CVE-2026-19489 · CSIRT Itálie (ACN) · Vulnerabilità in prodotti Citrix · NCSC-NL · NCSC-2026-0318 [1.00] [M/M] Kwetsbaarheden verholpen in Citrix NetScaler ADC en NetScaler Gateway · zachyceno · NCSC-FI · Citrix Netscaler ADC ja Gateway -tuotteissa kriittisiä haavoittuvuuksia · zachyceno · CERT-FR – avis · Multiples vulnérabilités dans les produits Citrix (20 août 2026)

Frequently asked questions about reported Citrix NetScaler zero-day vulnerabilities

There are reportedly two unpatched zero-day Citrix NetScaler vulnerabilities capable of enabling remote code execution that have been actively exploited in the wild, with no patches available at this time.Key takeawaysReports indicate that there are two critical zero-day vulnerabilities in Citrix NetScaler.The reports originate from a pre-notification sent out ahead of public disclosure, so there are currently no specific details about these flaws and no patches available.This post will be…

KEV ✓ EPSS 0.58 CVE-2023-6549 CVE-2025-6543 CVE-2026-19489 CVE-2026-19490 Citrix US

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· Tenable Research · Frequently asked questions about reported Citrix NetScaler zero-day vulnerabilities