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. 

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Changed

Confidentiality Impact High

Integrity Impact High

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is in the KEV database since today.

No EPSS score available.

Key SSVC decision points have not yet been added.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
Cisco Cisco Catalyst SD-WAN Manager unknown
Version Status Constraints
20.1.12 affected —
19.2.1 affected —
18.4.4 affected —
18.4.5 affected —
20.1.1.1 affected —
20.1.1 affected —
19.3.0 affected —
19.2.2 affected —
19.2.099 affected —
18.3.6 affected —
18.3.7 affected —
19.2.0 affected —
18.3.8 affected —
19.0.0 affected —
19.1.0 affected —
18.4.302 affected —
18.4.303 affected —
19.2.097 affected —
19.2.098 affected —
17.2.10 affected —
18.3.6.1 affected —
19.0.1a affected —
18.2.0 affected —
18.4.3 affected —
18.4.1 affected —
17.2.8 affected —
18.3.3.1 affected —
18.4.0 affected —
18.3.1 affected —
17.2.6 affected —
17.2.9 affected —
18.3.4 affected —
17.2.5 affected —
18.3.1.1 affected —
18.3.5 affected —
18.4.0.1 affected —
18.3.3 affected —
17.2.7 affected —
17.2.4 affected —
18.3.0 affected —
19.2.3 affected —
18.4.501_ES affected —
20.3.1 affected —
20.1.2 affected —
19.2.929 affected —
19.2.31 affected —
20.3.2 affected —
19.2.32 affected —
20.3.2_925 affected —
20.3.2.1 affected —
20.3.2.1_927 affected —
18.4.6 affected —
20.1.2_937 affected —
20.4.1 affected —
20.3.2_928 affected —
20.3.2_929 affected —
20.4.1.0.1 affected —
20.3.2.1_930 affected —
19.2.4 affected —
20.5.0.1.1 affected —
20.4.1.1 affected —
20.3.3 affected —
19.2.4.0.1 affected —
20.3.2_937 affected —
20.3.3.1 affected —
20.5.1 affected —
20.1.3 affected —
20.3.3.0.4 affected —
20.3.3.1.2 affected —
20.3.3.1.1 affected —
20.4.1.2 affected —
20.3.3.0.2 affected —
20.4.1.1.5 affected —
20.4.1.0.01 affected —
20.4.1.0.02 affected —
20.3.3.1.7 affected —
20.3.3.1.5 affected —
20.5.1.0.1 affected —
20.3.3.1.10 affected —
20.3.3.0.8 affected —
20.4.2 affected —
20.4.2.0.1 affected —
20.3.4 affected —
20.3.3.0.14 affected —
19.2.4.0.8 affected —
19.2.4.0.9 affected —
20.3.4.0.1 affected —
20.3.2.0.5 affected —
20.6.1 affected —
20.5.1.0.2 affected —
20.3.3.0.17 affected —
20.6.1.1 affected —
20.6.0.18.3 affected —
20.3.2.0.6 affected —
20.6.0.18.4 affected —
20.4.2.0.2 affected —
20.3.3.0.16 affected —
20.3.4.0.5 affected —
20.6.1.0.1 affected —
20.3.4.0.6 affected —
20.6.2 affected —
20.7.1EFT2 affected —
20.3.4.0.9 affected —
20.3.4.0.11 affected —
20.4.2.0.4 affected —
20.3.3.0.18 affected —
20.7.1 affected —
20.6.2.1 affected —
20.3.4.1 affected —
20.5.1.1 affected —
20.4.2.1 affected —
20.4.2.1.1 affected —
20.3.4.1.1 affected —
20.3.813 affected —
20.3.4.0.19 affected —
20.4.2.2.1 affected —
20.5.1.2 affected —
20.3.4.2 affected —
20.3.814 affected —
20.4.2.2 affected —
20.6.2.2 affected —
20.3.4.2.1 affected —
20.7.1.1 affected —
20.3.4.1.2 affected —
20.6.2.2.2 affected —
20.3.4.0.20 affected —
20.6.2.2.3 affected —
20.4.2.2.2 affected —
20.3.5 affected —
20.6.2.0.4 affected —
20.4.2.2.3 affected —
20.3.4.0.24 affected —
20.6.2.2.7 affected —
20.6.3 affected —
20.3.4.2.2 affected —
20.4.2.2.4 affected —
20.7.1.0.2 affected —
20.8.1 affected —
20.3.5.0.8 affected —
20.3.5.0.9 affected —
20.4.2.2.8 affected —
20.3.5.0.7 affected —
20.6.3.0.7 affected —
20.6.3.0.5 affected —
20.6.3.0.10 affected —
20.6.3.0.2 affected —
20.7.2 affected —
20.9.1EFT2 affected —
20.6.3.0.11 affected —
20.6.3.1 affected —
20.6.3.0.14 affected —
20.6.4 affected —
20.9.1 affected —
20.6.3.0.19 affected —
20.6.3.0.18 affected —
20.3.6 affected —
20.9.1.1 affected —
20.6.3.0.23 affected —
20.6.4.0.4 affected —
20.6.3.0.25 affected —
20.6.5 affected —
20.6.3.0.27 affected —
20.9.2 affected —
20.9.2.1 affected —
20.6.3.0.29 affected —
20.6.3.0.31 affected —
20.6.3.0.32 affected —
20.10.1 affected —
20.6.3.0.33 affected —
20.9.2.0.01 affected —
20.9.1_LI_Images affected —
20.10.1_LI_Images affected —
20.9.2_LI_Images affected —
20.3.7 affected —
20.9.3 affected —
20.6.5.1 affected —
20.11.1 affected —
20.11.1_LI_Images affected —
20.9.3_LI_ Images affected —
20.6.3.1.1 affected —
20.9.3.0.2 affected —
20.6.5.1.2 affected —
20.9.3.0.3 affected —
20.4.2.3 affected —
20.6.3.2 affected —
20.6.4.1 affected —
20.6.3.0.38 affected —
20.6.3.0.39 affected —
20.3.5.1 affected —
20.3.4.3 affected —
20.9.3.1 affected —
20.3.3.2 affected —
20.6.5.2 affected —
20.3.7.1 affected —
20.10.1.1 affected —
20.6.5.2.1 affected —
20.3.4.0.25 affected —
20.6.2.2.4 affected —
20.6.1.2 affected —
20.11.1.1 affected —
20.9.3.0.5 affected —
20.3.4.0.26 affected —
20.6.5.1.3 affected —
20.6.3.0.40 affected —
20.1.3.1 affected —
20.9.2.2 affected —
20.6.5.2.3 affected —
20.6.5.1.4 affected —
20.6.5.3 affected —
20.6.3.0.41 affected —
20.9.3.0.7 affected —
20.6.5.1.5 affected —
20.9.3.0.4 affected —
20.6.4.0.19 affected —
20.6.5.1.6 affected —
20.9.3.0.8 affected —
20.6.3.3 affected —
20.3.7.2 affected —
20.6.5.4 affected —
20.6.5.1.7 affected —
20.9.3.0.12 affected —
20.6.4.2 affected —
20.6.5.5 affected —
20.9.3.2 affected —
20.11.1.2 affected —
20.6.3.4 affected —
20.10.1.2 affected —
20.6.5.1.9 affected —
20.9.3.0.16 affected —
20.6.3.0.45 affected —
20.6.5.1.10 affected —
20.9.3.0.17 affected —
20.6.5.2.4 affected —
20.6.4.0.21 affected —
20.9.3.0.18 affected —
20.6.3.0.46 affected —
20.6.3.0.47 affected —
20.9.2.3 affected —
20.9.3.2_LI_Images affected —
20.9.3.0.21 affected —
20.9.3.0.20 affected —
20.9.4_LI_Images affected —
20.9.4 affected —
20.6.5.1.11 affected —
20.12.1 affected —
20.12.1_LI_Images affected —
20.6.5.1.13 affected —
20.9.3.0.23 affected —
20.6.5.2.8 affected —
20.9.4.1 affected —
20.9.4.1_LI_Images affected —
20.9.3.0.25 affected —
20.9.3.0.24 affected —
20.6.5.1.14 affected —
20.3.8 affected —
20.6.6 affected —
20.9.3.0.26 affected —
20.6.3.0.51 affected —
20.9.3.0.29 affected —
20.12.2 affected —
20.12.2_LI_Images affected —
20.6.6.0.1 affected —
20.13.1_LI_Images affected —
20.9.4.0.4 affected —
20.13.1 affected —
20.9.4.1.1 affected —
20.9.5 affected —
20.9.5_LI_Images affected —
20.12.3_LI_Images affected —
20.12.3 affected —
20.9.4.1.3 affected —
20.6.7 affected —
20.9.5.1 affected —
20.9.5.1_LI_Images affected —
20.9.4.1.6 affected —
20.14.1 affected —
20.14.1_LI_Images affected —
20.9.5.2 affected —
20.9.5.2.1 affected —
20.9.5.2_LI_Images affected —
20.12.3.1 affected —
20.12.4 affected —
20.15.1_LI_Images affected —
20.15.1 affected —
20.9.5.1.4 affected —
20.9.5.2.7 affected —
20.9.5.2.13 affected —
20.9.6 affected —
20.9.6_LI_Images affected —
20.9.5.2.14 affected —
20.6.8 affected —
20.12.4.0.03 affected —
20.16.1 affected —
20.16.1_LI_Images affected —
20.12.4_LI_Images affected —
20.9.5.2.16 affected —
20.12.4.0.4 affected —
20.12.401 affected —
20.9.5.3 affected —
20.9.5.3_LI_Images affected —
20.12.4.1_LI_Images affected —
20.12.4.1 affected —
20.9.5.2.21 affected —
20.9.6.0.3 affected —
20.12.4.0.6 affected —
20.15.2_LI_Images affected —
20.15.2 affected —
20.12.4_Monthly_ES5 affected —
20.12.5 affected —
20.12.5_LI_Images affected —
20.9.7_LI _Images affected —
20.9.7 affected —
20.15.3 affected —
20.15.3_ LI _Images affected —
20.12.501 affected —
20.12.5.1_LI_Images affected —
20.12.5.1 affected —
20.12.5.2_LI_Images affected —
20.12.5.2 affected —
20.15.3.1 affected —
20.15.4_LI_Images affected —
20.15.4 affected —
20.9.7.1_LI _Images affected —
20.9.7.1 affected —
20.18.1 affected —
20.18.1_LI_Images affected —
20.12.6_LI_Images affected —
20.12.6 affected —
20.12.5.1.01 affected —
20.9.8 affected —
20.9.8_LI_Images affected —
20.18.2 affected —
20.15.4.1_LI_Images affected —
20.15.4.1 affected —
20.18.2_LI_Images affected —

No data.

No data.

No data.

Project Subscriptions

No data.

Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sdwan-rpa-EHchtZk cve-icon cve-icon
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-20127 cve-icon
History

Wed, 25 Feb 2026 18:30:00 +0000

Type Values Removed Values Added
References

Wed, 25 Feb 2026 17:15:00 +0000

Type Values Removed Values Added
Description 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. 
Title Cisco Catalyst SD-WAN Controller Authentication Bypass Vulnerability
Weaknesses CWE-287
References
Metrics cvssV3_1

{'score': 10, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H'}

kev

{'dateAdded': '2026-02-25T00:00:00+00:00', 'dueDate': '2026-02-27T00:00:00+00:00'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: cisco

Published:

Updated: 2026-02-25T17:56:56.143Z

Reserved: 2025-10-08T11:59:15.379Z

Link: CVE-2026-20127

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-02-25T17:25:29.477

Modified: 2026-02-25T18:23:39.710

Link: CVE-2026-20127

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses