Cisco Catalyst SD-WAN Controller Authentication Bypass Vulnerability_CVE-2026-20182

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CRITICAL

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

Description

May 2026: This security advisory provides the details and fix information for a vulnerability that was discovered and fixed after the was disclosed in February 2026. This new advisory is for a new vulnerability in the control connection handshaking. The section of this advisory includes Show Control Connections guidance to help with system checks.

A vulnerability in the peering authentication in Cisco Catalyst SD-WAN Controller, formerly SD-WAN vSmart, and Cisco Catalyst SD-WAN Manager, formerly SD-WAN vManage, could allow an unauthenticated, remote attacker to bypass authentication and obtain administrative privileges on an affected system.
This vulnerability exists because the peering authentication mechanism in an affected system is not working properly. An attacker could exploit this vulnerability by sending crafted requests to the affected system. A successful exploit could allow the attacker to log in to an affected Cisco Catalyst SD-WAN Controller as an internal, high-privileged, non-root user account. Using this account, the attacker could access NETCONF, which would then allow the attacker to manipulate network configuration for the SD-WAN fabric.

AI Analysis

AI processing failed - invalid JSON response

Basic Information

ID CVE-2026-20182

Source cisco

Published May 14, 2026 at 16:08

Affected Product

Vendor Cisco

Product Cisco Catalyst SD-WAN Manager

Version 20.1.12

Affected Versions Cisco Cisco Catalyst SD-WAN Manager 20.1.12
Cisco Cisco Catalyst SD-WAN Manager 19.2.1
Cisco Cisco Catalyst SD-WAN Manager 18.4.4
Cisco Cisco Catalyst SD-WAN Manager 18.4.5
Cisco Cisco Catalyst SD-WAN Manager 20.1.1.1
Cisco Cisco Catalyst SD-WAN Manager 20.1.1
Cisco Cisco Catalyst SD-WAN Manager 19.2.099
Cisco Cisco Catalyst SD-WAN Manager 18.3.6
Cisco Cisco Catalyst SD-WAN Manager 18.3.7
Cisco Cisco Catalyst SD-WAN Manager 19.2.0
Cisco Cisco Catalyst SD-WAN Manager 19.1.0
Cisco Cisco Catalyst SD-WAN Manager 18.4.303
Cisco Cisco Catalyst SD-WAN Manager 19.2.098
Cisco Cisco Catalyst SD-WAN Manager 18.3.6.1
Cisco Cisco Catalyst SD-WAN Manager 18.2.0
Cisco Cisco Catalyst SD-WAN Manager 17.2.8
Cisco Cisco Catalyst SD-WAN Manager 18.3.3.1
Cisco Cisco Catalyst SD-WAN Manager 18.4.0
Cisco Cisco Catalyst SD-WAN Manager 18.3.1
Cisco Cisco Catalyst SD-WAN Manager 17.2.6
Cisco Cisco Catalyst SD-WAN Manager 17.2.9
Cisco Cisco Catalyst SD-WAN Manager 17.2.5
Cisco Cisco Catalyst SD-WAN Manager 18.4.0.1
Cisco Cisco Catalyst SD-WAN Manager 18.3.3
Cisco Cisco Catalyst SD-WAN Manager 18.3.0
Cisco Cisco Catalyst SD-WAN Manager 19.2.3
Cisco Cisco Catalyst SD-WAN Manager 18.4.501_ES
Cisco Cisco Catalyst SD-WAN Manager 20.1.2
Cisco Cisco Catalyst SD-WAN Manager 19.2.929
Cisco Cisco Catalyst SD-WAN Manager 19.2.31
Cisco Cisco Catalyst SD-WAN Manager 20.3.2
Cisco Cisco Catalyst SD-WAN Manager 19.2.4
Cisco Cisco Catalyst SD-WAN Manager 19.2.4.0.9
Cisco Cisco Catalyst SD-WAN Manager 20.1.3.1

References

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    "modified": "2026-05-14T16:08:25.566Z",
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