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10.0
CVE-2026-20127KEV

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, r

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. 

Affected Products

VendorProductVersions
ciscocatalyst_sd-wan_manager< 20.9.8.2, < 20.12.5.3, < 20.15.4.2, < 20.18.2.1, < 20.9.8.2, < 20.12.5.3, < 20.15.4.2, < 20.18.2.1

References

  • 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)

Related News (1 articles)

Tier D
CSO Online2h ago
Chained vulnerabilities in Cisco Catalyst switches could induce denial-of-service
→ No new info (linked only)
CVSS 3.110.0 CRITICAL
VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
CISA KEV✅ Yes
Actively exploited✅ Yes
CWECWE-287, CWE-287
Published2/25/2026
Last enriched19h ago
Trending Score89
Source articles1
Independent1
Info Completeness10/14
Missing: epss, patch, iocs, mitre_attack

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Verification

State: verified
Confidence: 100%