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Citrix patches critical NetScaler flaws reminiscent of CitrixBleed vulnerability

Feeds.4Sysops •IT News • July 1, 2026

Citrix has released urgent security updates to address six vulnerabilities in NetScaler ADC and NetScaler Gateway appliances. The most severe flaws, including CVE-2026-8451, carry a CVSS score of 8.8 and involve insufficient input validation that leads to memory overreads. These vulnerabilities primarily affect systems configured as SAML Identity Providers, a common setup for enabling single sign-on across enterprise applications. Source

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Citrix NetScaler Vulnerabilities Enable DoS and Memory Disclosure Attacks Citrix disclosed six high-severity vulnerabilities in NetScaler ADC and Gateway appliances, including CVE-2026-8451, which allows unauthenticated memory disclosure when configured as a SAML identity provider. Other vulnerabilities can lead to denial-of-service (DoS) attacks, arbitrary file access, and memory overreads. The vulnerabilities were published on June 30, 2026, with a proof-of-concept exploit for CVE-2026-8451 released on July 1, 2026. So far, there are no confirmed reports of exploitation. Affected systems include those configured for single sign-on and DNS proxy setups. Administrators are urged to apply security updates to mitigate risks. 85 sources 74

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Citrix patches critical NetScaler flaws reminiscent of CitrixBleed vulnerability

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Extracted Entities

CVEs (1)

CWE Weaknesses (1)

Vulnerabilities (1)