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Zero-Day CVE-2026-76460, CVE-2026-87886

CISA Flags Actively Exploited Cisco ISE Privileged API Flaw in KEV Catalog

CISA added two vulnerabilities to its Known Exploited Vulnerabilities (KEV) Catalog based on evidence of active exploitation. The most identity-relevant is CVE-2026-76460, an incorrect use of privileged APIs in Cisco Identity Services Engine (ISE). The second, CVE-2026-87886, is an incorrect default permissions flaw in Acronis Backup.

The Cisco ISE flaw is notable for identity teams because ISE is a core network access control and authentication platform, frequently integrated with Active Directory and RADIUS/802.1X policy enforcement. A privileged API weakness could let attackers escalate privileges or manipulate access policies, undermining the very system that governs who and what connects to the network.

Under BOD 26-04, federal civilian agencies must prioritize rapid remediation of KEV-listed flaws on exposed, high-impact assets and check whether compromise occurred before patching. What to take away: organizations running Cisco ISE should patch immediately and audit for signs of privileged API abuse, since a compromised access-control platform can cascade across the entire identity fabric.

Primary source

CISA Cybersecurity Advisories

Read at cisa.gov ↗

Summary by AD Argus. We publish our own analysis with attribution and a link to the original report; always consult the primary source for authoritative detail.