--- title: "CVE-2026-20182: Cisco Catalyst SD-WAN Controller… | CubePath" description: "May 2026: This security advisory provides the details and fix information for a vulnerability that was discovered and fixed after the was disclosed…" language: en source: https://cubepath.com/security/cve/CVE-2026-20182 --- # CVE-2026-20182: Cisco Catalyst SD-WAN Controller… | CubePath ## Description 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. Official description from the CVE record, published by cisco. Copyright © 1999-2026 The MITRE Corporation. See [/security/cve/legal](https://cubepath.com/security/cve/legal) for the CVE license. [View the record on cve.org](https://www.cve.org/CVERecord?id=CVE-2026-20182) ## Key data ### CVSS 3.1 Critical 10.0 Score published by cisco in the CVE record. CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H | Metric | Value | What it means | | ---------------------- | ------- | ----------------------------------------------------------------------------------- | | Attack vector | Network | The vulnerable component can be reached over a network, possibly from the Internet. | | Attack complexity | Low | No special conditions are needed. The attack can be repeated at will. | | Privileges required | None | No account or privileges are needed. | | User interaction | None | No action from any user is needed. | | Scope | Changed | The impact can reach other components beyond the vulnerable one. | | Confidentiality impact | High | Serious or total effect on the secrecy of data. | | Integrity impact | High | Serious or total effect on the trustworthiness of data. | | Availability impact | High | Serious or total effect on availability. | CVSS is owned and managed by FIRST.Org, Inc. (FIRST) and is used by permission. Each CVSS score on this site is shown together with its vector string, as published in the CVE record by the source named next to it. Learn more at [first.org/cvss](https://www.first.org/cvss/) . ### EPSS Exploit Prediction Scoring System by FIRST: an estimate of the probability that exploitation activity will be observed in the next 30 days. Score 0.91817 (91.8% probability) Percentile 99.8% Scores of Nov 10, 2026 Model v2026.06.15 ### CISA Known Exploited Vulnerabilities This CVE is listed in the CISA KEV catalog. Name in the catalog Cisco Catalyst SD-WAN Controller Authentication Bypass Vulnerability Added to the catalog May 14, 2026 Federal due date May 17, 2026 ### CISA assessment as of May 14, 2026 Stakeholder-Specific Vulnerability Categorization (SSVC) decision points added by CISA. Exploitation Recorded by CISA as active Automatable yes Technical impact total ### Weakness (CWE) CWE catalog version 5.0. CWE names: Copyright © 2006-2026, The MITRE Corporation. See [/security/cve/legal](https://cubepath.com/security/cve/legal) for the CWE license. - [CWE-287](https://cwe.mitre.org/data/definitions/287.html) Improper Authentication ## Affected products Products listed in the CVE record, as the CNA published them. - Cisco Catalyst SD-WAN Controller - affected: 20.6.4 - affected: 20.9.2 - affected: 20.3.6 - affected: 20.7.2 - affected: 20.7.1 - affected: 20.5.1 - affected: 20.6.2 - affected: 19.3.0 - affected: 20.6.1 - affected: 17.2.4 - affected: 18.2.0 - affected: 18.4.6 - affected: 19.1.0 - affected: 19.2.4 - affected: 19.2.929 - affected: 18.3.8 - affected: 18.4.303 - affected: 18.3.7 - affected: 18.4.1 - affected: 19.2.097 - affected: 19.2.0 - affected: 19.2.099 - affected: 18.3.6 - affected: 20.4.2 - affected: 19.0.0 - and 104 more - Cisco Catalyst SD-WAN Manager - affected: 20.1.12 - affected: 19.2.1 - affected: 18.4.4 - affected: 18.4.5 - affected: 20.1.1.1 - affected: 20.1.1 - affected: 19.2.099 - affected: 18.3.6 - affected: 18.3.7 - affected: 19.2.0 - affected: 19.1.0 - affected: 18.4.303 - affected: 19.2.098 - affected: 18.3.6.1 - affected: 18.2.0 - affected: 17.2.8 - affected: 18.3.3.1 - affected: 18.4.0 - affected: 18.3.1 - affected: 17.2.6 - affected: 17.2.9 - affected: 17.2.5 - affected: 18.4.0.1 - affected: 18.3.3 - affected: 18.3.0 - and 9 more ## References Links listed in the CVE record. They lead to other sites, which CubePath does not control. - [cisco-sa-sdwan-rpa2-v69WY2SW](https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sdwan-rpa2-v69WY2SW) (sec.cloudapps.cisco.com) - [Cisco Catalyst SD-WAN Controller Authentication Bypass Vulnerability was disclosed in February 2026\. This new advisory is for a new vulnerability in the control connection handshaking. The Indicators of Compromise](https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sdwan-rpa-EHchtZk) (sec.cloudapps.cisco.com) ## Timeline 1. ID reserved Oct 8, 2025 2. Added to CISA KEV May 14, 2026 3. Record published May 14, 2026 4. Record last updated Jun 16, 2026 ## Look up another CVE ## About CubePath CubePath is a cloud provider with data centers in Europe and the United States. It offers VPS, bare metal servers and DDoS protection. [Cloud VPS](https://cubepath.com/vps) [DDoS protection](https://cubepath.com/ddos-protection) Data from the CVE Program (MITRE), CISA KEV and FIRST EPSS. CVSS is owned by FIRST and used by permission. Not affiliated with or endorsed by MITRE, CISA or FIRST. Data as of Nov 10, 2026, 20:01 UTC. [Sources and licenses](https://cubepath.com/security/cve/legal)