CVE-2019-15262

Cisco Wireless LAN Controller Secure Shell Denial of Service Vulnerability

HIGH
7.5
CVSS Score
Published: October 16, 2019 at 06:36 PM UTC
Updated: June 17, 2026 at 02:19 AM UTC
5 products affected across 1 vendor5508 Wireless LAN Controller Firmware5520 Wireless LAN Controller Firmware5508 Wireless Lan Controller

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Severity
HIGH7.5
Exploit prediction
EPSS 1%
SSVC
No known exploit

Description

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v ≤ 8.5.140.0
cisco-5508-wireless-lan-controller (same device)
v ≤ 8.5.140.0
cisco-5520-wireless-lan-controller (same device)

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

SSVC — Action Prioritization

SSVCNo known exploitAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-20CWE-404

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