CVE-2026-20127

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2026-20127
A vulnerability in the peering authentication in Cisco Catalyst SD-WAN Controller, formerly SD-WAN vSmart, Cisco Catalyst SD-WAN Manager, formerly SD-WAN vManage, and Cisco Catalyst SD-WAN Validator, formerly SD-WAN vBond, 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. 

10.0 /10

CVSS v3 : CRITICAL

V3 Legend

Vector :

Exploitability : 3.9 / Impact : 6.0

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope CHANGED

References
Link Resource
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sdwan-rpa-EHchtZk Vendor Advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-20127 US Government Resource
Configurations

Configuration 1 (hide)

OR cpe:2.3:a:cisco:catalyst_sd-wan_manager:*:*:*:*:*:*:*:*
cpe:2.3:a:cisco:catalyst_sd-wan_manager:*:*:*:*:*:*:*:*
cpe:2.3:a:cisco:catalyst_sd-wan_manager:*:*:*:*:*:*:*:*
cpe:2.3:a:cisco:catalyst_sd-wan_manager:*:*:*:*:*:*:*:*
cpe:2.3:a:cisco:catalyst_sd-wan_manager:20.12.6:*:*:*:*:*:*:*
cpe:2.3:a:cisco:sd-wan_vbond_orchestrator:*:*:*:*:*:*:*:*
cpe:2.3:a:cisco:sd-wan_vbond_orchestrator:*:*:*:*:*:*:*:*
cpe:2.3:a:cisco:sd-wan_vbond_orchestrator:*:*:*:*:*:*:*:*
cpe:2.3:a:cisco:sd-wan_vbond_orchestrator:*:*:*:*:*:*:*:*
cpe:2.3:a:cisco:sd-wan_vbond_orchestrator:20.12.6:*:*:*:*:*:*:*
cpe:2.3:a:cisco:sd-wan_vsmart_controller:*:*:*:*:*:*:*:*
cpe:2.3:a:cisco:sd-wan_vsmart_controller:*:*:*:*:*:*:*:*
cpe:2.3:a:cisco:sd-wan_vsmart_controller:*:*:*:*:*:*:*:*
cpe:2.3:a:cisco:sd-wan_vsmart_controller:*:*:*:*:*:*:*:*
cpe:2.3:a:cisco:sd-wan_vsmart_controller:20.12.6:*:*:*:*:*:*:*
History

17 Jun 2026, 15:06

Type Values Removed Values Added
First Time Cisco sd-wan Vbond Orchestrator
CPE cpe:2.3:a:cisco:sd-wan_vbond_orchestrator:*:*:*:*:*:*:*:*
cpe:2.3:a:cisco:sd-wan_vbond_orchestrator:20.12.6:*:*:*:*:*:*:*

16 Jun 2026, 19:16

Type Values Removed Values Added
Summary
  • (es) Una vulnerabilidad en la autenticación de emparejamiento en Cisco Catalyst SD-WAN Controller, anteriormente SD-WAN vSmart, y Cisco Catalyst SD-WAN Manager, anteriormente SD-WAN vManage, podría permitir a un atacante remoto no autenticado eludir la autenticación y obtener privilegios administrativos en un sistema afectado. Esta vulnerabilidad existe porque el mecanismo de autenticación de emparejamiento en un sistema afectado no funciona correctamente. Un atacante podría explotar esta vulnerabilidad enviando solicitudes manipuladas a un sistema afectado. Un exploit exitoso podría permitir al atacante iniciar sesión en un Cisco Catalyst SD-WAN Controller afectado como una cuenta de usuario interna, con altos privilegios y no root. Usando esta cuenta, el atacante podría acceder a NETCONF, lo que luego permitiría al atacante manipular la configuración de red para la estructura SD-WAN.
Summary (en) 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.  (en) A vulnerability in the peering authentication in Cisco Catalyst SD-WAN Controller, formerly SD-WAN vSmart, Cisco Catalyst SD-WAN Manager, formerly SD-WAN vManage, and Cisco Catalyst SD-WAN Validator, formerly SD-WAN vBond, 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. 

26 Feb 2026, 16:20

Type Values Removed Values Added
First Time Cisco
Cisco sd-wan Vsmart Controller
Cisco catalyst Sd-wan Manager
CPE cpe:2.3:a:cisco:sd-wan_vsmart_controller:*:*:*:*:*:*:*:*
cpe:2.3:a:cisco:sd-wan_vsmart_controller:20.12.6:*:*:*:*:*:*:*
cpe:2.3:a:cisco:catalyst_sd-wan_manager:*:*:*:*:*:*:*:*
cpe:2.3:a:cisco:catalyst_sd-wan_manager:20.12.6:*:*:*:*:*:*:*
References () https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sdwan-rpa-EHchtZk - () https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sdwan-rpa-EHchtZk - Vendor Advisory
References () https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-20127 - () https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-20127 - US Government Resource

25 Feb 2026, 18:23

Type Values Removed Values Added
References
  • () https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-20127 -

25 Feb 2026, 17:25

Type Values Removed Values Added
New CVE
Information

Published : 2026-02-25 17:25

Updated : 2026-06-17 15:06

NVD link : CVE-2026-20127

Mitre link : CVE-2026-20127

CVE.ORG link : CVE-2026-20127

JSON object : View

Products Affected

cisco

  • sd-wan_vsmart_controller
  • sd-wan_vbond_orchestrator
  • catalyst_sd-wan_manager
CWE
CWE-287

Improper Authentication