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Vulnerabilities & CVEs BleepingComputer 2 weeks ago

CISA orders feds to patch exploited Citrix flaws by Wednesday

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CyberNew Threat Research Desk
• Original Reporting: BleepingComputer
CyberNew Threat Intel Assessment
Assessed Severity: CRITICAL
Impacted Surface
Cloud & Distributed Infrastructure
Intelligence Sector
Vulnerabilities & CVEs

Analyst Takeaway

"The Cybersecurity and Infrastructure Security Agency (CISA) has ordered U.S. government agencies over the weekend to secure their systems against attacks exploiting two critical Citrix NetScaler vulnerabilities. Citrix released security updates to address the flaws (tracked as CVE-2026-88771 and CVE-2026-88772 ) days after national cybersecurity agencies, IT suppliers, and security teams began..."

Recommended Defense & Mitigation

  • Emergency Patching: Prioritize vendor patches and CVE mitigation across internet-facing assets immediately.
  • Perimeter Audit: Inspect perimeter firewall logs and hunt for unauthorized RCE indicators.
Curated & Verified by CyberNew Threat Intelligence Desk Standard Defense Framework (NIST / MITRE ATT&CK)

Citrix

The Cybersecurity and Infrastructure Security Agency (CISA) has ordered U.S. government agencies over the weekend to secure their systems against attacks exploiting two critical Citrix NetScaler vulnerabilities.

Citrix released security updates to address the flaws (tracked as CVE-2026-88771 and CVE-2026-88772) days after national cybersecurity agencies, IT suppliers, and security teams began privately contacting Citrix customers and advising them to shut down their NetScaler appliances.

For instance, the Dutch National Cyber Security Center (NCSC-NL) reportedly warned organizations in the Netherlands about two critical NetScaler zero-days without CVE IDs that allowed threat actors to place shellcode directly into memory.

On Sunday, Citrix confirmed active exploitation of the two vulnerabilities in zero-day attacks and urged customers to patch their systems immediately.

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Source Verification & Original Intelligence

This threat report was reviewed by CyberNew analysts and cross-referenced with primary security disclosures from BleepingComputer.

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