Uncontrolled Memory Allocation in Cisco Systems, Inc products - CVE-2025-20140
Published: May 9, 2025
Vulnerability identifier: #VU108827
CSH Severity: Medium
CVSS v4.0: 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
CVE-ID: CVE-2025-20140
CWE-ID: CWE-789
Exploitation vector: Adjecent network
Exploit availability:
No public exploit available
Vendor: Cisco Systems, Inc
Affected software:
Cisco IOS XE
Catalyst 9800 Embedded Wireless Controller
Catalyst 9800 Series Wireless Controllers
Catalyst 9800-CL Wireless Controllers for Cloud
Embedded Wireless Controllers on Catalyst Access Points
Cisco IOS XE
Catalyst 9800 Embedded Wireless Controller
Catalyst 9800 Series Wireless Controllers
Catalyst 9800-CL Wireless Controllers for Cloud
Embedded Wireless Controllers on Catalyst Access Points
Detailed vulnerability description
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.
How to mitigate CVE-2025-20140
Install updates from vendor's website.