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VULNERABILITIES

CVE-2026-20127 Details

Description

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. 

Metrics

References to Advisories, Solutions, and Tools

By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.

URLSource(s)Tag(s)
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-20127 CISA-ADPUS Government Resource
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sdwan-rpa-EHchtZk [email protected]Vendor Advisory

This CVE is in CISA's Known Exploited Vulnerabilities Catalog

Reference CISA's BOD 22-01 and Known Exploited Vulnerabilities Catalog for further guidance and requirements.

Vulnerability NameDate AddedDue DateRequired Action
Cisco Catalyst SD-WAN Controller and Manager Authentication Bypass VulnerabilityFeb 25, 2026Feb 27, 2026Please adhere to CISA’s guidelines to assess exposure and mitigate risks associated with Cisco SD-WAN devices as outlines in CISA’s Emergency Directive 26-03 (URL listed below in Notes) and CISA’s “Hunt & Hardening Guidance for Cisco SD-WAN Devices (URL listed below in Notes). Adhere to the applicable BOD 22-01 guidance for cloud services or discontinue use of the product if mitigations are not available.

Weakness Enumeration

CWE-IDCWE NameSource
CWE-287Improper Authentication[email protected]
CWE-287Improper Authentication[email protected]

Affected Products

ProductVersions
cisco catalyst sd-wan manager
< 20.9.8.2
>= 20.11, < 20.12.5.3
>= 20.13, < 20.15.4.2
>= 20.16, < 20.18.2.1
20.12.6

CPE

  • cpe:2.3:a:cisco:catalyst_sd-wan_manager:*:*:*:*:*:*:*:*
  • cpe:2.3:a:cisco:catalyst_sd-wan_manager:20.12.6:*:*:*:*:*:*:*

Remediation

  • No remediation found in references.
cisco sd-wan vbond orchestrator
< 20.9.8.2
>= 20.11, < 20.12.5.3
>= 20.13, < 20.15.4.2
>= 20.16, < 20.18.2.1
20.12.6

CPE

  • cpe:2.3:a:cisco:sd-wan_vbond_orchestrator:*:*:*:*:*:*:*:*
  • cpe:2.3:a:cisco:sd-wan_vbond_orchestrator:20.12.6:*:*:*:*:*:*:*

Remediation

  • No remediation found in references.
cisco sd-wan vsmart controller
< 20.9.8.2
>= 20.11, < 20.12.5.3
>= 20.13, < 20.15.4.2
>= 20.16, < 20.18.2.1
20.12.6

CPE

  • cpe:2.3:a:cisco:sd-wan_vsmart_controller:*:*:*:*:*:*:*:*
  • cpe:2.3:a:cisco:sd-wan_vsmart_controller:20.12.6:*:*:*:*:*:*:*

Remediation

  • No remediation found in references.

Change History

8 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2026-20127
NVD Published Date:
Feb 25, 2026
NVD Last Modified:
Jun 17, 2026
Source:
[email protected]
CVE-2026-20127 Details - Not Deferred