NetScaler C2: A Massive CVE-2026

Socradar •ameer • October 7, 2026

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NetScaler C2: A Massive CVE-2026-88771 Exploitation Operation On September 27, 2026, Citrix released a security bulletin regarding multiple vulnerabilities in Citrix NetScaler ADC and Citrix NetScaler Gateway. One of the

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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 Citrix NetScaler Zero-Day Vulnerabilities Exploited In late September 2026, two critical zero-day vulnerabilities (CVE-2026-88771 and CVE-2026-88772) in Citrix NetScaler ADC and Gateway were actively exploited, allowing remote code execution. The Cybersecurity and Infrastructure Security Agency (CISA) added these CVEs to its Known Exploited Vulnerabilities catalog on September 27, 2026, with a CVSS score of 9.5. Attackers utilized custom web shells named WHIPSHOT and SLAPSHOT to gain unauthorized access to affected systems. Organizations in sectors such as government, finance, and healthcare were particularly vulnerable. Citrix has since released patches for these vulnerabilities, but the urgency of the situation has raised concerns about the effectiveness of their response. The incidents highlight the ongoing risks associated with internet-exposed edge devices and the need for rapid incident response. As of October 4, 2026, the exploitation is confirmed to be ongoing, with significant operational and compliance risks reported. 78 sources 80

Extracted Entities

CVEs (1)

Platforms (2)

Citrix NetScaler ADC Citrix NetScaler Gateway