CVE-2019-15262
HIGHCisco 5520/5508 WLC < 8.5.140.0 DoS via SSH Exhaustion
Title source: llmDescription
A vulnerability in the Secure Shell (SSH) session management for Cisco Wireless LAN Controller (WLC) Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. The vulnerability exists because the SSH process is not properly deleted when an SSH connection to the device is disconnected. An attacker could exploit this vulnerability by repeatedly opening SSH connections to an affected device. A successful exploit could allow the attacker to exhaust system resources by initiating multiple SSH connections to the device that are not effectively terminated, which could result in a DoS condition.
References (1)
Core 1
Core References
Vendor Advisory vendor-advisory
x_refsource_cisco
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20191016-wlc-ssh-dos
Scores
CVSS v3
7.5
EPSS
0.0141
EPSS Percentile
69.3%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
yes
Technical Impact
partial
Details
CWE
CWE-20
CWE-404
Status
published
Products (2)
cisco/5508_wireless_lan_controller_firmware
< 8.5.140.0
cisco/5520_wireless_lan_controller_firmware
< 8.5.140.0
Published
Oct 16, 2019
Tracked Since
Feb 18, 2026