Reference page — cumulative record through Sunday, October 4, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.
AV AC PR UI S C I A CVSS EPSS %ile KEV N L N N C H H H 10.0 .8848 99.8 YES
AFFECTED Product Versions Fixed Cisco Catalyst SD-WAN Manager 20.1.12 – —
TIMELINE Oct 8 Reserved by cisco Feb 25 Added to CISA KEV, remediation due 2026-02-27 Feb 25 Published (CNA: cisco)
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.
| Date | Event | Detail |
|---|---|---|
| October 8, 2025 | Reserved | Reserved by cisco |
| February 25, 2026 | KEV ADDED | Added to CISA KEV, remediation due 2026-02-27 |
| February 25, 2026 | Published | Published (CNA: cisco) |
| Vendor | Product / Package | Ecosystem | Version introduced | Fixed |
|---|---|---|---|---|
| Cisco | Cisco Catalyst SD-WAN Manager | — | 20.1.12 | — |
Authoritative record: CVE-2026-20127 at cve.org
Vendors: cisco
Weaknesses: CWE-287
This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-20127 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Sunday, October 4, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.
