SB2025110529 - Denial of service in Cisco Identity Services Engine (ISE)
Published: November 5, 2025
Security Bulletin ID
SB2025110529
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Adjecent network
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Incorrect comparison (CVE-ID: CVE-2025-20343)
CWE-ID: CWE-697 - Incorrect Comparison
CVSSv4: 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/E:U/U:Green
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.
Remediation
Install update from vendor's website.