CVE-2018-0443

Name: CVE-2018-0443
Creator: NVD / NIST
Published: 2018-10-17T22:29:00.723+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 3.38%

Last modified Jun 17, 2026

CVE-2018-0443 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. 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. EPSS estimates a 3.38% chance of exploitation in the next 30 days.

Description

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.

Metrics

CVSS 3.1

7.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS Probability

3.38%

87.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Cisco	Wireless Lan Controller Software	8.2\(151.0\)

References

http://www.securityfocus.com/bid/105686Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1041922Third Party Advisory, VDB Entry
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20181017-wlc-capwap-dosVendor Advisory
http://www.securityfocus.com/bid/105686Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1041922Third Party Advisory, VDB Entry
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20181017-wlc-capwap-dosVendor Advisory

Timeline

Published: Oct 17, 2018
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2018-0443?

How severe is CVE-2018-0443?

CVE-2018-0443 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 3.38% probability of exploitation in the next 30 days.

How do I fix CVE-2018-0443?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2018-0443?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST