SB2025050929 - Denial of service in Cisco IOS XE Software for WLC Wireless IPv6 Clients
Published: May 9, 2025
Security Bulletin ID
SB2025050929
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) Uncontrolled Memory Allocation (CVE-ID: CVE-2025-20140)
CWE-ID: CWE-789 - Uncontrolled Memory Allocation
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 improper memory management in the Wireless Network Control daemon (wncd). A remote attacker on the local network can send a specially crafted IPv6 network request and cause a denial of service (DoS) condition on the target system.
Remediation
Install update from vendor's website.