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CRITICAL THREAT · Cybersecurity Alert

CISA Updates Known Exploited Vulnerabilities Catalog: Immediate Action Required

The Cybersecurity and Infrastructure Security Agency (CISA) has identified and added multiple vulnerabilities to its Known Exploited Vulnerabilities (KEV) Catalog throughout October 2026, confirming these flaws are being actively exploited by malicious actors.

11/1/2026Adobe CommerceMagentoGoogle BrotliGitLab Community and Enterprise EditionsCisco Secure Firewall ASA and FTD SoftwarePlex Media ServerCitrix NetScalerZammad GmbHBeyondTrust Remote SupportFortinet productsPHP

Warning signs

  • Unusual system behavior or unauthorized access attempts
  • Presence of unpatched software versions listed in the CISA KEV Catalog
  • Unexpected network traffic or system crashes related to specific software services
  • Alerts from security software regarding known CVEs

What you should do

  • Regularly monitor the CISA Known Exploited Vulnerabilities (KEV) Catalog for updates
  • Prioritize the remediation of vulnerabilities listed in the KEV Catalog
  • Implement a risk-based vulnerability management program
  • Ensure all software and firmware are updated to the latest secure versions provided by vendors
  • Review CISA's official guidance on vulnerability mitigation
CISA continues to update its KEV Catalog to address vulnerabilities that pose significant risks to federal enterprises and private organizations. Recent additions include critical flaws in software such as Adobe Commerce, Magento, Google Brotli, GitLab, and Cisco products. These vulnerabilities are frequently used as attack vectors, allowing unauthorized access or control over affected systems. While Binding Operational Directive (BOD) 26-04 mandates that federal agencies prioritize the remediation of these specific vulnerabilities, CISA strongly advises all organizations to adopt a risk-based vulnerability management approach and apply necessary patches immediately to mitigate potential exploitation.

Sources

https://www.cisa.gov/news-events/alerts/2026/10/27/cisa-adds-two-known-exploited-vulnerabilities-cataloghttps://www.cisa.gov/news-events/alerts/2026/10/29/cisa-adds-two-known-exploited-vulnerabilities-cataloghttps://www.cisa.gov/news-events/cybersecurity-advisories