International Cyber Digest on X: "‼️BREAKING: An actively exploited unknown critical Citrix ...

X • September 26, 2026

International Cyber Digest @IntCyberDigest ‼️BREAKING: An actively exploited unknown critical Citrix NetScaler zero-day has prompted governments and organizations to SHUTDOWN all their devices immediately. We don't know what's exactly going on yet. Stay tuned for more info. 3:07 PM · Sep 26, 2026 · 315.3K Views 56

International Cyber Digest @IntCyberDigest 1h Just to be clear: this vulnerability has not been disclosed yet and is new. So it's not fixed in previously released patches. 1

International Cyber Digest @IntCyberDigest 1h "has prompted governments and organizations to SHUTDOWN all their devices immediately." ->NO PATCH

trollied @trollied 5h Today I learned Citrix is still in business. 6

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This article is one source in a clustered incident — the cluster page carries the summary, timeline and every other outlet covering it.

Critical Zero-Day Vulnerabilities in Citrix NetScaler Under Active Exploitation On September 26, 2026, security firm watchTowr reported two unpatched zero-day vulnerabilities in Citrix NetScaler ADC and Gateway appliances, allowing remote code execution (RCE) and actively exploited in the wild. Citrix has confirmed the existence of these vulnerabilities, tracked as CVE-2026-88771 and CVE-2026-88772, with severity scores of 9.5. The vulnerabilities were discovered during forensic investigations, indicating they were exploited before any patch was available. Administrators were advised to shut down their NetScaler appliances as a precaution. Citrix has since released a security bulletin detailing these flaws and provided patches on September 27, 2026. The vulnerabilities affect all NetScaler ADC and Gateway deployments, including those with default configurations. Organizations using these systems are urged to apply the updates immediately to mitigate the risk of exploitation. 60 sources 81

International Cyber Digest on X: "‼️BREAKING: An actively exploited unknown critical Citrix ...

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Extracted Entities

Attack Types (1)

Vulnerabilities (1)