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CVE-2026-8451

citrix · netscaler application delivery controller

Published
CVSS7.5
Severityhigh
WeaknessCWE-125
ExploitedNot in CISA KEV

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Description

Insufficient input validation in NetScaler ADC and NetScaler Gateway leading to memory overread if NetScaler ADC or NetScaler Gateway is configured as a SAML IDP

References

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Our coverage of CVE-2026-8451

CVE-2026-19489critical

Critical NetScaler Flaw Can Bypass Authentication on Certain Gateway and AAA Servers

Citrix has released critical security updates for NetScaler ADC and NetScaler Gateway to address two vulnerabilities. The most severe, CVE-2026-19490 (CVSS 9.3), allows for authentication bypass on specific configurations, including those acting as Gateways or AAA servers with SAML actions. A second flaw, CVE-2026-19489 (CVSS 8.8), is a memory overflow leading to potential denial-of-service when the SIP ALG is enabled.

CVE-2026-46817high

Ransomware Attacks Hit Financial, Defense, and Manufacturing Firms

Several organizations, including River Bank & Trust, Indra Group, and Nidec, have recently fallen victim to ransomware attacks. These incidents have led to potential data exfiltration and service disruptions. Additionally, a new AI-driven ransomware technique has been demonstrated that exploits browser APIs to encrypt user files.