May 2026: This security advisory provides the details and fix information for a vulnerability that was discovered and fixed after the was disclosed in February 2026. This new advisory is for a new vulnerability in the control connection handshaking. The section of this advisory includes Show Control Connections guidance to help with system checks. 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 the 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.
This vulnerability carries a CRITICAL severity rating with a CVSS v3.1 score of 10.0, indicating it can be exploited remotely over the network with relatively low complexity without requiring user interaction and does not require pre-existing privileges . The vulnerability impacts confidentiality (data exposure), integrity (unauthorized modifications), and availability (service disruption) for affected systems. Impacting 3 products from cisco, from cisco, from cisco organizations running these solutions should prioritize assessment and patching.
Reported in 2026, this vulnerability emerged during an era marked by increased sophistication in supply chain attacks, cloud infrastructure vulnerabilities, and software-as-a-service (SaaS) security challenges. Security practices during this period emphasized zero-trust architectures, container security, and API protection.
2026-05-14T17:16:19.387
2026-06-17T15:06:02.767
Analyzed
CVSSv3.1: 10.0 (CRITICAL)
| Type | Vendor | Product | Version/Range | Vulnerable? |
|---|---|---|---|---|
| Application | cisco | catalyst_sd-wan_manager | < 20.9.9.1 | Yes |
| Application | cisco | catalyst_sd-wan_manager | < 20.12.5.4 | Yes |
| Application | cisco | catalyst_sd-wan_manager | < 20.12.6.2 | Yes |
| Application | cisco | catalyst_sd-wan_manager | < 20.15.4.4 | Yes |
| Application | cisco | catalyst_sd-wan_manager | < 20.15.5.2 | Yes |
| Application | cisco | catalyst_sd-wan_manager | < 20.18.2.2 | Yes |
| Application | cisco | catalyst_sd-wan_manager | < 26.1.1.1 | Yes |
| Application | cisco | catalyst_sd-wan_manager | 20.12.7 | Yes |
| Application | cisco | sd-wan_vbond_orchestrator | < 20.9.9.1 | Yes |
| Application | cisco | sd-wan_vbond_orchestrator | < 20.12.5.4 | Yes |
| Application | cisco | sd-wan_vbond_orchestrator | < 20.12.6.2 | Yes |
| Application | cisco | sd-wan_vbond_orchestrator | < 20.15.4.4 | Yes |
| Application | cisco | sd-wan_vbond_orchestrator | < 20.15.5.2 | Yes |
| Application | cisco | sd-wan_vbond_orchestrator | < 20.18.2.2 | Yes |
| Application | cisco | sd-wan_vbond_orchestrator | < 26.1.1.1 | Yes |
| Application | cisco | sd-wan_vbond_orchestrator | 20.12.7 | Yes |
| Application | cisco | sd-wan_vsmart_controller | < 20.9.9.1 | Yes |
| Application | cisco | sd-wan_vsmart_controller | < 20.12.5.4 | Yes |
| Application | cisco | sd-wan_vsmart_controller | < 20.12.6.2 | Yes |
| Application | cisco | sd-wan_vsmart_controller | < 20.15.4.4 | Yes |
| Application | cisco | sd-wan_vsmart_controller | < 20.15.5.2 | Yes |
| Application | cisco | sd-wan_vsmart_controller | < 20.18.2.2 | Yes |
| Application | cisco | sd-wan_vsmart_controller | < 26.1.1.1 | Yes |
| Application | cisco | sd-wan_vsmart_controller | 20.12.7 | Yes |
SecUtils normalizes and enriches National Vulnerability Database (NVD) records by standardizing vendor and product identifiers, aggregating vulnerability metadata from both NVD and MITRE sources, and providing structured context for security teams. For cisco's affected products, we extract Common Platform Enumeration (CPE) data, Common Weakness Enumeration (CWE) classifications, CVSS severity metrics, and reference data to enable rapid vulnerability prioritization and asset correlation. This record contains no exploit code, proof-of-concept instructions, or attack methodologies—only defensive intelligence necessary for patch management, risk assessment, and security operations.