CVE-2018-0248: Cisco Wireless LAN Controller Software GUI Configuration Denial of Service Vulnerabilities

Severity: medium (CVSS 4.9 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 2.0% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2019-04-17 · updated 2026-06-17
Weakness: CWE-20

Description

A vulnerability in the administrative GUI configuration feature of Cisco Wireless LAN Controller (WLC) Software could allow an aUTHENTICated, remote attacker to cause the device to reload unexpectedly during device configuration when the administrator is using this GUI, causing a denial of service (DoS) condition on an affected device. The attacker would need to have valid administrator credentials on the device. This vulnerability is due to incomplete input validation for unexpected configuration options that the attacker could submit while accessing the GUI configuration menus. An attacker could exploit these vulnerabilities by authenticating to the device and submitting crafted user input when using the administrative GUI configuration feature. A successful exploit could allow the attacker to cause the device to reload, resulting in a DoS condition. Software versions prior to 8.3.150.0, 8.5.140.0, 8.8.111.0 are affected by this vulnerability.

Affected products

Cisco Wireless LAN Controller (WLC): before 8.3.150.0; from 8.4 before 8.5.140.0; from 8.6 before 8.8.111.0 — fixed in 8.3.150.0, 8.5.140.0, 8.8.111.0

How to fix

Upgrade to a fixed version: Cisco Wireless LAN Controller (WLC) 8.3.150.0, 8.5.140.0, 8.8.111.0. Check the vendor advisory for mitigations.

References

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