CISA Says Attackers Are Exploiting Two Critical Citrix NetScaler Flaws Globally

Monday, September 28, 2026 at 07:21 AM UTC·Source: The Hacker News

Updated: Monday, September 28, 2026 at 11:00 AM UTC

Executive Summary

The U.S. Cybersecurity and Infrastructure Security Agency (CISA) on Sunday added two critical Citrix NetScaler ADC and Gateway flaws to its Known Exploited Vulnerabilities (KEV) catalog, following reports of active exploitation. The vulnerabilities are listed below - CVE-2026-88771 (CVSS score: 9.5) - An improper input validation vulnerability that could allow an unauthenticated attacker to

Analysis

Indicators of Compromise (1)

CVE (1)

CVE-2026-88771

NVD MITRE CVE

Source Attribution

Originally published by The Hacker News on Sep 28, 2026.

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