CVE-2025-20140
published 2025-05-07CVE-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…
PriorityP336high7.4CVSS 3.1
AVAACLPRNUINSCCNINAH
EPSS
0.20%
10.4th percentile
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
389 ranges· showing 25
| Vendor | Product | Version range | Fixed in |
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| cisco | cisco_ios_xe_software | — | — |
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CVSS provenance
nvdv3.17.4HIGHCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
vendor_cisco7.4HIGH
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Cisco
Cisco IOS XE Software for WLC Wireless IPv6 Clients Denial of Service Vulnerability
vendor_cisco·2025-05-07·CVSS 7.4
CVE-2025-20140 [HIGH] CWE-789 Cisco IOS XE Software for WLC Wireless IPv6 Clients Denial of Service Vulnerability
Cisco IOS XE Software for WLC Wireless IPv6 Clients Denial of Service Vulnerability
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
Cisco
Cisco IOS XE Software for WLC Wireless IPv6 Clients Denial of Service Vulnerability
vendor_cisco·CVSS 3.1
CVE-2025-20140 Cisco IOS XE Software for WLC Wireless IPv6 Clients Denial of Service Vulnerability
CVE-2025-20140: Cisco IOS XE Software for WLC Wireless IPv6 Clients Denial of Service Vulnerability
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 ev
GHSA
GHSA-pxp6-97q7-w6wm: A vulnerability in the Wireless Network Control daemon (wncd) of Cisco IOS XE Software for Wireless LAN Controllers (WLCs) could allow an unauthentica
ghsa_unreviewed·2025-05-07
CVE-2025-20140 [HIGH] CWE-789 GHSA-pxp6-97q7-w6wm: A vulnerability in the Wireless Network Control daemon (wncd) of Cisco IOS XE Software for Wireless LAN Controllers (WLCs) could allow an unauthentica
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.
No detection rules found.
No public exploits indexed.
No writeups or analysis indexed.
2025-05-07
Published