Uncontrolled Memory Allocation in Cisco Systems, Inc products - CVE-2025-20140
Published: May 9, 2025
Vulnerability identifier: #VU108827
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-2025-20140
CWE-ID: CWE-789
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 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.
Affected software
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 Series Wireless Controllers
Catalyst 9800-CL Wireless Controllers for Cloud
Embedded Wireless Controllers on Catalyst Access Points
Cisco IOS XE
How to mitigate CVE-2025-20140
Install updates from vendor's website.
Cisco IOS XE - addressed in versions 17.9.6, 17.9.6a, 17.9.6b, 17.9.7, 17.9.7a, 17.12.1z2, 17.12.1z3, 17.12.4, 17.12.4a, 17.12.4b, 17.12.5, 17.12.5a, 17.15.1, 17.15.1w, 17.15.1x, 17.15.1y, 17.15.1a, 17.15.1b, 17.15.2, 17.15.2c, 17.15.2a, 17.15.2b, 17.15.3, 17.16.1, 17.16.1a, 17.17.1