CVE-2026-20182

Cisco Catalyst SD-WAN — Cisco Catalyst SD-WAN Controller Authentication Bypass Vulnerability

criticalAktiv ausgenutztPoCEPSS 100%
Severity
critical
Priority-Score
237.56
KEV-Status
Aktiv ausgenutzt
Exploit-Reife
aktiv ausgenutzt (KEV)
CVSS v3
10.0
CVSS v4
—
EPSS-Perzentil
99.8 %
Kritisch — Modell sagt sehr hohe Ausnutzungs-Wahrscheinlichkeit in den nächsten 30 Tagen.
Veröffentlicht
2026-05-14 00:00 UTC
CWE
CWE-287

Weakness-Klassen (CWE)

  • CWE-287Class

    Improper Authentication

    When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct.

    cwe.mitre.org →

Re-Analyse & Statuswechsel

Chronologie der NVD-Audit-Events für diese CVE — Reanalyses, CVSS-Updates, CPE-Diffs.

  1. CVE Modified2026-06-16 19:16 UTC· psirt@cisco.com
    • 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, 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 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. → 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.

Beschreibung

Cisco Catalyst SD-WAN Controller & Manager enthalten eine Authentifizierungs-Umgehungs-Schwachstelle, die es einem nicht authentifizierten, entfernten Angreifer ermöglicht, die Authentifizierung zu umgehen und administrative Rechte auf einem betroffenen System zu erlangen.

Quelle: CISA_KEV

Öffentliche Exploit-Referenzen

Öffentliche Proof-of-Concepts und Detection-Templates für diese Schwachstelle. Die Reife reicht von gemeldeten PoCs über funktionsfähige Detection-Skripte bis hin zu vollständig waffenfähigen Exploit-Modulen. NEOSEC mirrort den Code intern für forensische Analysen; nach außen verlinken wir ausschließlich auf die Original-Quellen.

Quellen & Referenzen

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