CVE-2025-20140 — Cisco / Cisco IOS XE Software

Description (CNA)

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.

Affected (CNA)

Vendor / product	Versions
Cisco / Cisco IOS XE Software	affected 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

Vendor / product

Versions

Cisco / Cisco IOS XE Software

affected 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

CWE

CWE-789

References

https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-wlc-wncd-p6Gvt6HL

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.