CCB Alert on X: "Warning: CVE-2026-88779 (CVSS 9.1) affects NetScaler ADC and ...

X • October 5, 2026

CCB Alert on X: "Warning: CVE-2026-88779 (CVSS 9.1) affects NetScaler ADC and NetScaler Gateway, allowing remote attackers to cause denial of service via a memory overflow. The vulnerability is actively exploited. Advisory: #Patch #Patch #Patch"

Warning: CVE-2026-88779 (CVSS 9.1) affects NetScaler ADC and NetScaler Gateway, allowing remote attackers to cause denial of service via a memory overflow. The vulnerability is actively exploited. Advisory:

The full story

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

CCB Alert on X: "Warning: CVE-2026-88779 (CVSS 9.1) affects NetScaler ADC and ...

The full story

Extracted Entities

Attack Types (1)

CVEs (1)

CWE Weaknesses (2)