TI-2018-00402 Aliases CVE-2018-0443 GHSA-w55v-5qm4-5hrw

Resource management flaw in Cisco Wireless LAN Controller

MEDIUM 45CWE-399Published 2018-10-17 · Updated 2024-11-26

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Impact type: Denial of service
Confidentiality · integrity · availability: None · None · High
Fix status: No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-399 and the CVSS impact.

Summary

A vulnerability in the Control and Provisioning of Wireless Access Points (CAPWAP) protocol component of Cisco Wireless LAN Controller (WLC) Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition. The vulnerability is due to improper input validation on fields within CAPWAP Discovery Request packets by the affected device. An attacker could exploit this vulnerability by sending malicious CAPWAP Discovery Request packets to the Cisco WLC Software. A successful exploit could allow the attacker to cause the Cisco WLC Software to disconnect associated access points (APs). While the APs disconnect and reconnect, service will be unavailable for a brief period of time, resulting in a DoS condition.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.03381 88th percentileScored 2026-11-07

Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: Yes
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
Cisco	Cisco Wireless LAN Controller (WLC)	all versions	—	No fix listed	CNA

Cisco Wireless LAN Controller (WLC) VendorCisco Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:o:cisco:wireless_lan_controller_software:8.2\(151.0\):::::::*	8.2(151.0)	Vulnerable	Cisco

cpe:2.3:o:cisco:wireless_lan_controller_software:8.2\(151.0\):*:*:*:*:*:*:* Versions 8.2(151.0) Vulnerable ·Cisco

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2018-0443
2026-10-03 Alias added: GHSA-w55v-5qm4-5hrw

References

Advisory 1

20181017 Cisco Wireless LAN Controller Software Control and Provisioning of Wireless Access Points Protocol Denial of Service Vulnerability

TI-2019-11388 Cisco Wireless LAN Controller HTTP Parsing Engine Denial of Service Vulnerability CVSS 3.1MEDIUM 6.5
TI-2016-01254 Buffer overflow in the redirection functionality in Cisco Wireless LAN Controller (WLC)… CVSS 3.1CRITICAL 9.8
TI-2018-00213 Resource management flaw in Cisco Wireless LAN Controller CVSS 3.0HIGH 8.6
TI-2007-01958 The SNMP implementation in the Cisco Wireless LAN Controller (WLC) before 20070419 uses… CVSS 2.0HIGH 10.0
TI-2015-05301 Cisco Wireless LAN Controller (WLC) devices with software 7.6.x, 8.0 before 8.0.121.0… CVSS 3.0CRITICAL 9.8
TI-2014-00660 Cisco Wireless LAN Controller (WLC) devices 7.4 before 7.4.110.0 distribute Aironet IOS… CVSS 2.0HIGH 10.0

See all 87 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences