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CISA Adds Three Actively Exploited Vulnerabilities to KEV Catalog, Including Cisco ISE and Acronis Backup Flaws

The US Cybersecurity and Infrastructure Security Agency has added three vulnerabilities with confirmed in-the-wild exploitation to its Known Exploited Vulnerabilities catalog. The flaws affect Cisco Identity Services Engine, its Passive Identity Connector, and Acronis Backup plugins for cPanel and Plesk. All three entries carry a remediation deadline of September 19, 2026. The Cisco issue stems from insufficient authentication controls on an API endpoint that lets remote attackers bypass the web-based management interface. The Acronis vulnerability arises from overly permissive default settings in server-management plugins, enabling privilege escalation. Federal agencies have been directed to investigate potential compromises and apply mitigations without delay.

Security NEXTTranslated from Japanese

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The US Cybersecurity and Infrastructure Security Agency (CISA) has added three vulnerabilities with confirmed exploitation in the wild to its Known Exploited Vulnerabilities (KEV) catalog. The additions were announced on September 16, 2026, with a mandatory remediation deadline of September 19 for all affected products.

Two of the flaws reside in Cisco Identity Services Engine (ISE) and Cisco ISE Passive Identity Connector (ISE-PIC). Tracked as CVE-2026-76460, the vulnerability results from insufficient authentication controls on an API endpoint. Unauthenticated remote attackers can bypass the web-based management interface and gain unauthorized access to the affected appliances.

The third entry concerns Acronis Backup. The flaw, identified as CVE-2026-87886, affects the plugin for cPanel & WHM and the extension for Plesk. Default access permissions are configured too permissively, allowing attackers to escalate privileges on the server.

CISA is urging all federal civilian agencies to prioritize investigation of potential intrusions and to apply available mitigations or patches by the stated deadline.

Cisco ISECVE-2026-76460Acronis BackupCVE-2026-87886ISE-PIC
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