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CVE-2026-20352NVD
Vulnerability 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.
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.
CVSS v3.1 Base Metrics — Score 8.6 (HIGH)
Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredNone
User InteractionNone
ScopeChanged
ConfidentialityNone
IntegrityNone
AvailabilityHigh
Affected & Patched Versions
- Cisco Cisco Identity Services Engine Software >= 3.2.0
- Cisco Cisco Identity Services Engine Software >= 3.2.0 p1
- Cisco Cisco Identity Services Engine Software >= 3.2.0 p2
- Cisco Cisco Identity Services Engine Software >= 3.3.0
- Cisco Cisco Identity Services Engine Software >= 3.2.0 p3
- Cisco Cisco Identity Services Engine Software >= 3.2.0 p4
- Cisco Cisco Identity Services Engine Software >= 3.2.0 p5
- Cisco Cisco Identity Services Engine Software >= 3.2.0 p6
- Cisco Cisco Identity Services Engine Software >= 3.3 Patch 2
- Cisco Cisco Identity Services Engine Software >= 3.3 Patch 1
- Cisco Cisco Identity Services Engine Software >= 3.3 Patch 3
- Cisco Cisco Identity Services Engine Software >= 3.4.0
- Cisco Cisco Identity Services Engine Software >= 3.2.0 p7
- Cisco Cisco Identity Services Engine Software >= 3.3 Patch 4
- Cisco Cisco Identity Services Engine Software >= 3.4 Patch 1
- Cisco Cisco Identity Services Engine Software >= 3.3 Patch 5
- Cisco Cisco Identity Services Engine Software >= 3.3 Patch 6
- Cisco Cisco Identity Services Engine Software >= 3.4 Patch 2
- Cisco Cisco Identity Services Engine Software >= 3.3 Patch 7
- Cisco Cisco Identity Services Engine Software >= 3.4 Patch 3
- Cisco Cisco Identity Services Engine Software >= 3.5.0
- Cisco Cisco Identity Services Engine Software >= 3.4 Patch 4
- Cisco Cisco Identity Services Engine Software >= 3.3 Patch 8
- Cisco Cisco Identity Services Engine Software >= 3.2 Patch 8
- Cisco Cisco Identity Services Engine Software >= 3.5 Patch 1
- Cisco Cisco Identity Services Engine Software >= 3.3 Patch 9
- Cisco Cisco Identity Services Engine Software >= 3.2 Patch 9
- Cisco Cisco Identity Services Engine Software >= 3.4 Patch 5
- Cisco Cisco Identity Services Engine Software >= 3.5 Patch 3
- Cisco Cisco Identity Services Engine Software >= 3.5 Patch 2
- Cisco Cisco Identity Services Engine Software >= 3.3 Patch 10
- Cisco Cisco Identity Services Engine Software >= 3.3 Patch 11
- Cisco Cisco Identity Services Engine Software >= 3.4 Patch 6
- Cisco Cisco Identity Services Engine Software >= 3.2 Patch 10
Not provided by cveorg for this CVE.