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CVE-2026-20352

Cisco Identity Services Engine RADIUS Denial of Service Vulnerability

Published
Last modified
published
Not listed in CISA KEV
None on Exploit-DB, Metasploit or GitHub
  • Exploitation: none
  • Automatable: yes
  • Technical impact: partial

Summary

A vulnerability in the RADIUS feature of Cisco Identity Services Engine (ISE) could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability is due to improper handling of certain RADIUS requests. An attacker could exploit this vulnerability by sending a crafted RADIUS request directly to an affected device. A successful exploit could allow the attacker to cause the ISE node to become unavailable. For single node deployments in that condition, endpoints that have not already authenticated would be unable to access the network until the node comes back up on its own.

Timeline

  1. CVE published
  2. CISA SSVC assessment

    Exploitation: none · Automatable: yes · Technical impact: partial

  3. Record last updated

Affected versions

  • Cisco Cisco Identity Services Engine Software

    3.2.0, 3.2.0 p1, 3.2.0 p2, 3.3.0, 3.2.0 p3, 3.2.0 p4, 3.2.0 p5, 3.2.0 p6, 3.3 Patch 2, 3.3 Patch 1, 3.3 Patch 3, 3.4.0, 3.2.0 p7, 3.3 Patch 4, 3.4 Patch 1, 3.3 Patch 5, 3.3 Patch 6, 3.4 Patch 2, 3.3 Patch 7, 3.4 Patch 3, 3.5.0, 3.4 Patch 4, 3.3 Patch 8, 3.2 Patch 8, 3.5 Patch 1, 3.3 Patch 9, 3.2 Patch 9, 3.4 Patch 5, 3.5 Patch 3, 3.5 Patch 2, and 4 more

References 1

sec.cloudapps.cisco.com