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Vulnerability Intelligence Report
Cisco Catalyst SD-WAN Controller Authentication Bypass Vulnerability

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. 

CISA KEV SSVC: Active Exploitation Automatable
CVSS Base Score
10.0
CRITICAL
Exploitability:3.9
Impact Score:6.1
EPSS Probability:57.79%
Executive Threat Verdict
Evaluating...
Evaluating Threat Landscape...
Assessing known weaponization, exploitation telemetry, and federal advisories.
Attack Surface
—
Authentication
—
Weaponization
—
SSVC Action
—

Weaknesses (CWE)

CWE-287 ↗Improper Authentication

Affected Products & Versions

Vendor Product Affected Versions
Cisco Cisco Catalyst SD-WAN Manager 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)

References & Technical Advisories

NVD Listing ↗ MITRE Listing ↗ GitHub Advisory ↗
No reference links found.

Threat Intelligence Signals

CISA KEV
ACTIVE IN CATALOG
EPSS Score
57.793%
GitHub Advisory
GHSA-p4cq-46q3-jr7w ↗

Identity & Timeline

StatusPUBLISHED
Assigning AuthorityCisco Systems, Inc. · Hosted Service · USA
Reserved2025-10-08T11:59:15
Published2026-02-25T16:14:20
Last Updated2026-06-16T17:57:59

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