Description
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.
Reserved 2024-10-10 | Published 2025-05-07 | Updated 2025-05-07 | Assigner
ciscoHIGH: 7.4CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
Problem types
Uncontrolled Memory Allocation
Product status
16.4.1
affected
16.4.2
affected
16.4.3
affected
16.5.1
affected
16.5.1a
affected
16.5.1b
affected
16.5.2
affected
16.5.3
affected
16.6.1
affected
16.6.2
affected
16.6.3
affected
16.6.4
affected
16.6.5
affected
16.6.4a
affected
16.6.5a
affected
16.6.6
affected
16.6.7
affected
16.6.8
affected
16.6.9
affected
16.6.10
affected
16.7.1
affected
16.7.1a
affected
16.7.1b
affected
16.7.2
affected
16.7.3
affected
16.7.4
affected
16.8.1
affected
16.8.1a
affected
16.8.1b
affected
16.8.1s
affected
16.8.1c
affected
16.8.1d
affected
16.8.2
affected
16.8.1e
affected
16.8.3
affected
16.9.1
affected
16.9.2
affected
16.9.1a
affected
16.9.1b
affected
16.9.1s
affected
16.9.3
affected
16.9.4
affected
16.9.3a
affected
16.9.5
affected
16.9.5f
affected
16.9.6
affected
16.9.7
affected
16.9.8
affected
16.10.1
affected
16.10.1a
affected
16.10.1b
affected
16.10.1s
affected
16.10.1c
affected
16.10.1e
affected
16.10.1d
affected
16.10.2
affected
16.10.1f
affected
16.10.1g
affected
16.10.3
affected
16.11.1
affected
16.11.1a
affected
16.11.1b
affected
16.11.2
affected
16.11.1s
affected
16.12.1
affected
16.12.1s
affected
16.12.1a
affected
16.12.1c
affected
16.12.1w
affected
16.12.2
affected
16.12.1y
affected
16.12.2a
affected
16.12.3
affected
16.12.8
affected
16.12.2s
affected
16.12.1x
affected
16.12.1t
affected
16.12.4
affected
16.12.3s
affected
16.12.3a
affected
16.12.4a
affected
16.12.5
affected
16.12.6
affected
16.12.1z1
affected
16.12.5a
affected
16.12.5b
affected
16.12.1z2
affected
16.12.6a
affected
16.12.7
affected
16.12.9
affected
16.12.10
affected
16.12.10a
affected
16.12.11
affected
16.12.12
affected
17.1.1
affected
17.1.1a
affected
17.1.1s
affected
17.1.1t
affected
17.1.3
affected
17.2.1
affected
17.2.1r
affected
17.2.1a
affected
17.2.1v
affected
17.2.2
affected
17.2.3
affected
17.3.1
affected
17.3.2
affected
17.3.3
affected
17.3.1a
affected
17.3.1w
affected
17.3.2a
affected
17.3.1x
affected
17.3.1z
affected
17.3.4
affected
17.3.5
affected
17.3.4a
affected
17.3.6
affected
17.3.4b
affected
17.3.4c
affected
17.3.5a
affected
17.3.5b
affected
17.3.7
affected
17.3.8
affected
17.3.8a
affected
17.4.1
affected
17.4.2
affected
17.4.1a
affected
17.4.1b
affected
17.4.2a
affected
17.5.1
affected
17.5.1a
affected
17.6.1
affected
17.6.2
affected
17.6.1w
affected
17.6.1a
affected
17.6.1x
affected
17.6.3
affected
17.6.1y
affected
17.6.1z
affected
17.6.3a
affected
17.6.4
affected
17.6.1z1
affected
17.6.5
affected
17.6.6
affected
17.6.6a
affected
17.6.5a
affected
17.6.7
affected
17.6.8
affected
17.6.8a
affected
17.7.1
affected
17.7.1a
affected
17.7.1b
affected
17.7.2
affected
17.10.1
affected
17.10.1a
affected
17.10.1b
affected
17.8.1
affected
17.8.1a
affected
17.9.1
affected
17.9.1w
affected
17.9.2
affected
17.9.1a
affected
17.9.1x
affected
17.9.1y
affected
17.9.3
affected
17.9.2a
affected
17.9.1x1
affected
17.9.3a
affected
17.9.4
affected
17.9.1y1
affected
17.9.5
affected
17.9.4a
affected
17.9.5a
affected
17.9.5b
affected
17.9.5e
affected
17.9.5f
affected
17.11.1
affected
17.11.1a
affected
17.12.1
affected
17.12.1w
affected
17.12.1a
affected
17.12.1x
affected
17.12.2
affected
17.12.3
affected
17.12.2a
affected
17.12.1y
affected
17.12.1z
affected
17.12.3a
affected
17.12.1z1
affected
17.13.1
affected
17.13.1a
affected
17.14.1
affected
17.14.1a
affected
17.11.99SW
affected
References
sec.cloudapps.cisco.com/...visory/cisco-sa-wlc-wncd-p6Gvt6HL (cisco-sa-wlc-wncd-p6Gvt6HL)
cve.org (CVE-2025-20140)
nvd.nist.gov (CVE-2025-20140)
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