CVE-2026-20352 Cisco Identity Services Engine - Denial of Service

Cisco Identity Services Engine contains a denial of service vulnerability caused by improper handling of crafted RADIUS requests, letting unauthenticated remote attackers cause node unavailability, exploit requires sending crafted RADIUS requests.

CVSS base score 8.6 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
EPSS
0.40% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Denial of Service
Impact
Denial Of Service
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
Published
16 September 2026
Updated
15 October 2026
Weakness
CWE-119

Vendor fix

Update to the latest available version that addresses this vulnerability.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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