<ul data-eligibleForWebStory="true"><li>The U.S. Cybersecurity and Infrastructure Security Agency (CISA) added the Citrix NetScaler vulnerability CVE-2025-6543 to its Known Exploited Vulnerabilities catalog.</li><li>CVE-2025-6543 is a memory overflow vulnerability in NetScaler ADC and NetScaler Gateway, potentially leading to Denial of Service.</li><li>Affected versions include NetScaler ADC 13.1-FIPS, 14.1, and earlier versions, requiring prompt mitigation to protect against attacks exploiting the flaw.</li><li>CISA has issued directives for federal agencies to address the vulnerabilities by July 21, 2025, following a similar inclusion of other Citrix vulnerabilities in the past.</li></ul>

U.S. CISA adds Citrix NetScaler flaw to its Known Exploited Vulnerabilities catalog

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