Incorrect comparison in Cisco Identity Services Engine (ISE) - CVE-2025-20343
Published: November 5, 2025
Vulnerability identifier: #VU118128
CSH Severity: Medium
CVSS v4: 7.1 [CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2025-20343
CWE-ID: CWE-697
Exploitation vector: Adjecent network
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to a logic error when processing a RADIUS access request for a MAC address. A remote attacker on the local network can send a specific sequence of multiple crafted RADIUS access request messages and perform a denial of service (DoS) attack.
Affected software
Cisco Identity Services Engine (ISE)
How to mitigate CVE-2025-20343
Install updates from vendor's website.
Cisco Identity Services Engine (ISE) - update to 3.4 Patch 4