CVE-2026-20127
published 2026-02-25CVE-2026-20127: 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…
critical10CVSS 3.1
AVNACLPRNUINSCCHIHAH
KEVEXPLOIT
CISA Known Exploited Vulnerabilitydue 2026-02-27
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 an 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.
Affected
346 ranges· showing 25
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| cisco | catalyst_sd-wan_controller | — | — |
| cisco | catalyst_sd-wan_manager | < 20.9.8.2 | 20.9.8.2 |
| cisco | catalyst_sd-wan_manager | — | — |
| cisco | catalyst_sd-wan_manager | >= 20.11 < 20.12.5.3 | 20.12.5.3 |
| cisco | catalyst_sd-wan_manager | >= 20.13 < 20.15.4.2 | 20.15.4.2 |
| cisco | catalyst_sd-wan_manager | >= 20.16 < 20.18.2.1 | 20.18.2.1 |
| cisco | cisco_catalyst_sd-wan_manager | — | — |
| cisco | cisco_catalyst_sd-wan_manager | — | — |
| cisco | cisco_catalyst_sd-wan_manager | — | — |
| cisco | cisco_catalyst_sd-wan_manager | — | — |
| cisco | cisco_catalyst_sd-wan_manager | — | — |
| cisco | cisco_catalyst_sd-wan_manager | — | — |
| cisco | cisco_catalyst_sd-wan_manager | — | — |
| cisco | cisco_catalyst_sd-wan_manager | — | — |
| cisco | cisco_catalyst_sd-wan_manager | — | — |
| cisco | cisco_catalyst_sd-wan_manager | — | — |
| cisco | cisco_catalyst_sd-wan_manager | — | — |
| cisco | cisco_catalyst_sd-wan_manager | — | — |
| cisco | cisco_catalyst_sd-wan_manager | — | — |
| cisco | cisco_catalyst_sd-wan_manager | — | — |
| cisco | cisco_catalyst_sd-wan_manager | — | — |
| cisco | cisco_catalyst_sd-wan_manager | — | — |
| cisco | cisco_catalyst_sd-wan_manager | — | — |
| cisco | cisco_catalyst_sd-wan_manager | — | — |
| cisco | cisco_catalyst_sd-wan_manager | — | — |
CVSS provenance
nvdv3.110.0CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
vulncheck10.0CRITICAL
cisa10.0CRITICAL