CVE-2025-20140
A vulnerability in the Wireless Network Control daemon (wncd) of Cisco IOS XE Software for Wireless LAN Controllers (WLCs) could allow an unauthenticated, adjacent wireless attacker to cause a denial of service (DoS) condition. This vulnerability is due to improper memory management. An attacker could exploit this vulnerability by sending a series of IPv6 network requests from an associated wireless IPv6 client to an affected device. To associate a client to a device, an attacker may first need to authenticate to the network, or associate freely in the case of a configured open network. A successful exploit could allow the attacker to cause the wncd process to consume available memory and eventually cause the device to stop responding, resulting in a DoS condition.
Scoring
- Severity
- HIGH
- CVSS base score
- 7.4
- CVSS vector
- CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
- EPSS probability
- 0.24%
- CWE
- CWE-789
- Published
- 2025-05-07
- Last modified
- 2026-03-12
Affected products
- Cisco Cisco IOS XE Software
- Cisco Cisco IOS XE Software
- Cisco Cisco IOS XE Software
- Cisco Cisco IOS XE Software
- Cisco Cisco IOS XE Software
- Cisco Cisco IOS XE Software
- Cisco Cisco IOS XE Software
- Cisco Cisco IOS XE Software
Weakness type
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