CVE-2026-20127
Essential information
- Published
- 25/02/2026 01:00
- Modified
- 18/06/2026 17:17
- Author
- The MITRE Corporation
- Creator
- The MITRE Corporation
- CVSS
- 10.0 CRITICAL (v3.1)
- CISA KEV
- Yes
- CWE
- CWE-287
- CVSS vector
-
—
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H—
CVSS metrics
- Access vector
- —
- Access complexity
- —
- Authentication
- —
- Confidentiality impact
- —
- Integrity impact
- —
- Availability impact
- —
- Exploitability
- —
- Remediation level
- —
- Report confidence
- —
- Temporal score
- —
- Attack vector
- NETWORK
- Attack complexity
- LOW
- Privileges required
- NONE
- User interaction
- NONE
- Scope
- CHANGED
- Confidentiality impact
- HIGH
- Integrity impact
- HIGH
- Availability impact
- HIGH
- Exploit code maturity
- —
- Remediation level
- —
- Report confidence
- —
- Temporal score
- —
- Attack vector
- —
- Attack complexity
- —
- Attack requirements
- —
- Privileges required
- —
- User interaction
- —
- Confidentiality (V)
- —
- Confidentiality (S)
- —
- Integrity (V)
- —
- Integrity (S)
- —
- Availability (V)
- —
- Availability (S)
- —
- Exploit maturity
- —
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.
NVD status
- Status
- Analyzed — CVE has had analysis completed and all data associations made.
- Source
- [email protected]
- NVD
- View on NVD
Affected products (CPE)
| Product | CPE |
|---|---|
| cisco / catalyst sd-wan manager | cpe:2.3:a:cisco:catalyst_sd-wan_manager:*:*:*:*:*:*:*:* |
| cisco / catalyst sd-wan manager | cpe:2.3:a:cisco:catalyst_sd-wan_manager:*:*:*:*:*:*:*:* |
| cisco / catalyst sd-wan manager | cpe:2.3:a:cisco:catalyst_sd-wan_manager:*:*:*:*:*:*:*:* |
| cisco / catalyst sd-wan manager | cpe:2.3:a:cisco:catalyst_sd-wan_manager:*:*:*:*:*:*:*:* |
| cisco / catalyst sd-wan manager | cpe:2.3:a:cisco:catalyst_sd-wan_manager:20.12.6:*:*:*:*:*:*:* |
| cisco / sd-wan vsmart controller | cpe:2.3:a:cisco:sd-wan_vsmart_controller:*:*:*:*:*:*:*:* |
| cisco / sd-wan vsmart controller | cpe:2.3:a:cisco:sd-wan_vsmart_controller:*:*:*:*:*:*:*:* |
| cisco / sd-wan vsmart controller | cpe:2.3:a:cisco:sd-wan_vsmart_controller:*:*:*:*:*:*:*:* |
| cisco / sd-wan vsmart controller | cpe:2.3:a:cisco:sd-wan_vsmart_controller:*:*:*:*:*:*:*:* |
| cisco / sd-wan vsmart controller | cpe:2.3:a:cisco:sd-wan_vsmart_controller:20.12.6:*:*:*:*:*:*:* |