--- id: "CVE-2026-20182" kind: "vulnerability" aliases: ["CVE-2026-20182"] title: "May 2026: This security advisory provides the details and fix information for a vulnerability that was discovered\u2026" severity: "critical" cvss: 10.0 epss: null exploited: true status: "open" category: "infrastructure" products: [{"name": "Cisco Catalyst SD-WAN", "fixed": [], "affected": "", "ecosystem": "vendor"}, {"name": "cisco catalyst sd-wan manager", "fixed": ["20.9.9.1"], "affected": "< 20.9.9.1", "ecosystem": "vendor"}, {"name": "cisco catalyst sd-wan manager", "fixed": ["20.12.5.4"], "affected": ">= 20.10, < 20.12.5.4", "ecosystem": "vendor"}, {"name": "cisco catalyst sd-wan manager", "fixed": ["20.12.6.2"], "affected": ">= 20.12.6, < 20.12.6.2", "ecosystem": "vendor"}, {"name": "cisco catalyst sd-wan manager", "fixed": ["20.15.4.4"], "affected": ">= 20.13, < 20.15.4.4", "ecosystem": "vendor"}, {"name": "cisco catalyst sd-wan manager", "fixed": ["20.15.5.2"], "affected": ">= 20.15.5, < 20.15.5.2", "ecosystem": "vendor"}, {"name": "cisco catalyst sd-wan manager", "fixed": ["20.18.2.2"], "affected": ">= 20.16, < 20.18.2.2", "ecosystem": "vendor"}, {"name": "cisco catalyst sd-wan manager", "fixed": ["26.1.1.1"], "affected": ">= 26.1, < 26.1.1.1", "ecosystem": "vendor"}, {"name": "cisco catalyst sd-wan manager", "fixed": [], "affected": "= 20.12.7", "ecosystem": "vendor"}, {"name": "cisco sd-wan vbond orchestrator", "fixed": ["20.9.9.1"], "affected": "< 20.9.9.1", "ecosystem": "vendor"}, {"name": "cisco sd-wan vbond orchestrator", "fixed": ["20.12.5.4"], "affected": ">= 20.10, < 20.12.5.4", "ecosystem": "vendor"}, {"name": "cisco sd-wan vbond orchestrator", "fixed": ["20.12.6.2"], "affected": ">= 20.12.6, < 20.12.6.2", "ecosystem": "vendor"}, {"name": "cisco sd-wan vbond orchestrator", "fixed": ["20.15.4.4"], "affected": ">= 20.13, < 20.15.4.4", "ecosystem": "vendor"}, {"name": "cisco sd-wan vbond orchestrator", "fixed": ["20.15.5.2"], "affected": ">= 20.15.5, < 20.15.5.2", "ecosystem": "vendor"}, {"name": "cisco sd-wan vbond orchestrator", "fixed": ["20.18.2.2"], "affected": ">= 20.16, < 20.18.2.2", "ecosystem": "vendor"}, {"name": "cisco sd-wan vbond orchestrator", "fixed": ["26.1.1.1"], "affected": ">= 26.1, < 26.1.1.1", "ecosystem": "vendor"}, {"name": "cisco sd-wan vbond orchestrator", "fixed": [], "affected": "= 20.12.7", "ecosystem": "vendor"}, {"name": "cisco sd-wan vsmart controller", "fixed": ["20.9.9.1"], "affected": "< 20.9.9.1", "ecosystem": "vendor"}, {"name": "cisco sd-wan vsmart controller", "fixed": ["20.12.5.4"], "affected": ">= 20.10, < 20.12.5.4", "ecosystem": "vendor"}, {"name": "cisco sd-wan vsmart controller", "fixed": ["20.12.6.2"], "affected": ">= 20.12.6, < 20.12.6.2", "ecosystem": "vendor"}, {"name": "cisco sd-wan vsmart controller", "fixed": ["20.15.4.4"], "affected": ">= 20.13, < 20.15.4.4", "ecosystem": "vendor"}, {"name": "cisco sd-wan vsmart controller", "fixed": ["20.15.5.2"], "affected": ">= 20.15.5, < 20.15.5.2", "ecosystem": "vendor"}, {"name": "cisco sd-wan vsmart controller", "fixed": ["20.18.2.2"], "affected": ">= 20.16, < 20.18.2.2", "ecosystem": "vendor"}, {"name": "cisco sd-wan vsmart controller", "fixed": ["26.1.1.1"], "affected": ">= 26.1, < 26.1.1.1", "ecosystem": "vendor"}, {"name": "cisco sd-wan vsmart controller", "fixed": [], "affected": "= 20.12.7", "ecosystem": "vendor"}] ecosystems: ["vendor"] tags: ["cisco-catalyst-sd-wan", "exploited", "infrastructure", "sd-wan-controller", "sd-wan-manager", "self-hosted"] not_affected_if: ["no-sd-wan-controller-deployed"] published_at: "2026-05-14T00:00:00+00:00" first_seen_at: "2026-10-23T19:11:51+00:00" updated_at: "2026-10-23T23:44:51+00:00" sources: [{"source": "kev", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2026-20182", "first_seen_at": "2026-10-23T19:11:51+00:00"}, {"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-20182", "first_seen_at": "2026-10-23T23:44:51+00:00"}] --- # May 2026: This security advisory provides the details and fix information for a vulnerability that was discovered… Cisco Catalyst SD-WAN Controller and Manager contain an authentication bypass that lets an unauthenticated remote attacker gain administrative privileges on the affected system. CISA lists it as actively exploited in the wild. _Summary, check and fix written by a model from the sources; labelled as such._ ## Affected - vendor:Cisco Catalyst SD-WAN affected ? fixed ? - vendor:cisco catalyst sd-wan manager affected < 20.9.9.1 fixed 20.9.9.1 - vendor:cisco catalyst sd-wan manager affected >= 20.10, < 20.12.5.4 fixed 20.12.5.4 - vendor:cisco catalyst sd-wan manager affected >= 20.12.6, < 20.12.6.2 fixed 20.12.6.2 - vendor:cisco catalyst sd-wan manager affected >= 20.13, < 20.15.4.4 fixed 20.15.4.4 - vendor:cisco catalyst sd-wan manager affected >= 20.15.5, < 20.15.5.2 fixed 20.15.5.2 - vendor:cisco catalyst sd-wan manager affected >= 20.16, < 20.18.2.2 fixed 20.18.2.2 - vendor:cisco catalyst sd-wan manager affected >= 26.1, < 26.1.1.1 fixed 26.1.1.1 - vendor:cisco catalyst sd-wan manager affected = 20.12.7 fixed ? - vendor:cisco sd-wan vbond orchestrator affected < 20.9.9.1 fixed 20.9.9.1 - vendor:cisco sd-wan vbond orchestrator affected >= 20.10, < 20.12.5.4 fixed 20.12.5.4 - vendor:cisco sd-wan vbond orchestrator affected >= 20.12.6, < 20.12.6.2 fixed 20.12.6.2 - vendor:cisco sd-wan vbond orchestrator affected >= 20.13, < 20.15.4.4 fixed 20.15.4.4 - vendor:cisco sd-wan vbond orchestrator affected >= 20.15.5, < 20.15.5.2 fixed 20.15.5.2 - vendor:cisco sd-wan vbond orchestrator affected >= 20.16, < 20.18.2.2 fixed 20.18.2.2 - vendor:cisco sd-wan vbond orchestrator affected >= 26.1, < 26.1.1.1 fixed 26.1.1.1 - vendor:cisco sd-wan vbond orchestrator affected = 20.12.7 fixed ? - vendor:cisco sd-wan vsmart controller affected < 20.9.9.1 fixed 20.9.9.1 - vendor:cisco sd-wan vsmart controller affected >= 20.10, < 20.12.5.4 fixed 20.12.5.4 - vendor:cisco sd-wan vsmart controller affected >= 20.12.6, < 20.12.6.2 fixed 20.12.6.2 - vendor:cisco sd-wan vsmart controller affected >= 20.13, < 20.15.4.4 fixed 20.15.4.4 - vendor:cisco sd-wan vsmart controller affected >= 20.15.5, < 20.15.5.2 fixed 20.15.5.2 - vendor:cisco sd-wan vsmart controller affected >= 20.16, < 20.18.2.2 fixed 20.18.2.2 - vendor:cisco sd-wan vsmart controller affected >= 26.1, < 26.1.1.1 fixed 26.1.1.1 - vendor:cisco sd-wan vsmart controller affected = 20.12.7 fixed ? ## Timeline - 2026-10-23T19:11:51+00:00 kev https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2026-20182 - 2026-10-23T23:44:51+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-20182 ## From the sources 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. --- _Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_