- Critical 10.0
- Known exploited (CISA KEV)
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 al…
Scores
The facts
- Published
- 25 February 2026
- Last changed
- 17 June 2026
- NVD status
- Analyzed
- Severity
- Critical, CVSS 10.0 out of 10 (version 3.1)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H - Weakness
- Affects
- cisco catalyst sd-wan manager
- cisco sd-wan vbond orchestrator
- cisco sd-wan vsmart controller
- Known exploited
- Yes. CISA added it to the Known Exploited Vulnerabilities catalogue on 25 February 2026.
- EPSS
- 88.5% chance of exploitation activity in the next 30 days (percentile 100).
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