NCSC-2026-0157

Vulnerability from csaf_ncscnl - Published: 2026-05-15 06:46 - Updated: 2026-05-15 08:19
Summary
Kwetsbaarheden verholpen in Cisco Catalyst SD-WAN Controller en Manager
Notes
The Netherlands Cyber Security Center (henceforth: NCSC-NL) maintains this page to enhance access to its information and security advisories. The use of this security advisory is subject to the following terms and conditions: NCSC-NL makes every reasonable effort to ensure that the content of this page is kept up to date, and that it is accurate and complete. Nevertheless, NCSC-NL cannot entirely rule out the possibility of errors, and therefore cannot give any warranty in respect of its completeness, accuracy or continuous keeping up-to-date. The information contained in this security advisory is intended solely for the purpose of providing general information to professional users. No rights can be derived from the information provided therein. NCSC-NL and the Kingdom of the Netherlands assume no legal liability or responsibility for any damage resulting from either the use or inability of use of this security advisory. This includes damage resulting from the inaccuracy of incompleteness of the information contained in the advisory. This security advisory is subject to Dutch law. All disputes related to or arising from the use of this advisory will be submitted to the competent court in The Hague. This choice of means also applies to the court in summary proceedings.
Feiten: Cisco heeft een kwetsbaarheden verholpen in de Catalyst SD-WAN Controller en Manager producten.
Interpretaties: Cisco heeft 4 kwetsbaarheden verholpen in de Catalyst SD-WAN Controller en Manager producten. De kwetsbaarheden betreffen XXE-injectie, privilege-escalatie en authentication bypass. De authentication bypass kwetsbaarheid bevindt zich in het peering authenticatiemechanisme, waardoor niet-geauthenticeerde externe aanvallers verhoogde rechten kunnen verkrijgen. Hierdoor kunnen zij netwerkconfiguraties manipuleren en mogelijk netwerkoperaties verstoren. Met name SD-WAN controllers die poorten via publieke netwerken bereikbaar hebben lopen een verhoogd risico op misbruik. Cisco meldt bekend te zijn met berichten dat de authentication bypass kwetsbaarheid beperkt en gericht is misbruikt. De verwachting van het NCSC is dat op korte termijn een toename in scan- en misbruikverkeer zal plaatsvinden.
Oplossingen: Cisco heeft updates uitgebracht om de kwetsbaarheid te verhelpen. Ook heeft Cisco Indicators of Compromise (IoC's) beschikbaar gesteld om eventueel misbruik te detecteren. Zie bijgevoegde referenties voor meer informatie.
Dreigingsinformatie: Customers are encouraged to audit the auth.log file, located at /var/log/auth.log, for entries that are related to Accepted publickey for vmanage-admin from unknown or unauthorized IP addresses, as shown in the following example: `2026-02-10T22:51:36+00:00 vm sshd[804]: Accepted publickey for vmanage-admin from port [REDACTED PORT] ssh2: RSA SHA256:[REDACTED KEY]` Customers must check the IP address in the auth.log log file against the configured System IPs that are listed in the Cisco Catalyst SD-WAN Manager web UI in the WebUI > Devices > System IP column.
Kans: high
Schade: high
CWE-287: Improper Authentication
CVE-2026-20209

Multiple vulnerabilities in Cisco Catalyst SD-WAN Manager, including a privilege escalation flaw via audit log session data, allow remote attackers to access sensitive information and gain unauthorized high-level privileges.

5.4 (Medium)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
CWE-779 - Logging of Excessive Data
Affected products
Product Identifier Version Remediation
vers:unknown/*
Cisco / Catalyst SD-WAN
 vers:unknown/*
vers:unknown/*
Cisco / Catalyst SD-WAN Manager
 vers:unknown/*
CVE-2026-20224

Multiple vulnerabilities in Cisco Catalyst SD-WAN Manager, including an XML External Entity (XXE) injection in its web UI, allow unauthenticated remote attackers to access sensitive information, elevate privileges, and gain unauthorized application access.

8.6 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N
CWE-779 - Logging of Excessive Data
Affected products
Product Identifier Version Remediation
vers:unknown/*
Cisco / Catalyst SD-WAN
 vers:unknown/*
vers:unknown/*
Cisco / Catalyst SD-WAN Manager
 vers:unknown/*
CVE-2026-20210

Multiple vulnerabilities in Cisco Catalyst SD-WAN Manager, including improper redaction in the web UI, allow authenticated users with read-only access to escalate privileges, modify configurations, and gain unauthorized application access.

5.4 (Medium)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
CWE-779 - Logging of Excessive Data
Affected products
Product Identifier Version Remediation
vers:unknown/*
Cisco / Catalyst SD-WAN
 vers:unknown/*
vers:unknown/*
Cisco / Catalyst SD-WAN Manager
 vers:unknown/*
CVE-2026-20182

A critical authentication bypass vulnerability in Cisco Catalyst SD-WAN Controller and Manager allows unauthenticated remote attackers to gain administrative privileges and manipulate network configurations.

10.0 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Affected products
Product Identifier Version Remediation
vers:unknown/*
Cisco / Catalyst SD-WAN
 vers:unknown/*
vers:unknown/*
Cisco / Catalyst SD-WAN Manager
 vers:unknown/*
References
To clipboard 

{
  "document": {
    "category": "csaf_security_advisory",
    "csaf_version": "2.0",
    "distribution": {
      "tlp": {
        "label": "WHITE"
      }
    },
    "lang": "nl",
    "notes": [
      {
        "category": "legal_disclaimer",
        "text": "The Netherlands Cyber Security Center (henceforth: NCSC-NL) maintains this page to enhance access to its information and security advisories. The use of this security advisory is subject to the following terms and conditions:\n\n    NCSC-NL makes every reasonable effort to ensure that the content of this page is kept up to date, and that it is accurate and complete. Nevertheless, NCSC-NL cannot entirely rule out the possibility of errors, and therefore cannot give any warranty in respect of its completeness, accuracy or continuous keeping up-to-date. The information contained in this security advisory is intended solely for the purpose of providing general information to professional users. No rights can be derived from the information provided therein.\n\n    NCSC-NL and the Kingdom of the Netherlands assume no legal liability or responsibility for any damage resulting from either the use or inability of use of this security advisory. This includes damage resulting from the inaccuracy of incompleteness of the information contained in the advisory.\n    This security advisory is subject to Dutch law. All disputes related to or arising from the use of this advisory will be submitted to the competent court in The Hague. This choice of means also applies to the court in summary proceedings."
      },
      {
        "category": "description",
        "text": "Cisco heeft een kwetsbaarheden verholpen in de Catalyst SD-WAN Controller en Manager producten.",
        "title": "Feiten"
      },
      {
        "category": "description",
        "text": "Cisco heeft 4 kwetsbaarheden verholpen in de Catalyst SD-WAN Controller en Manager producten. De kwetsbaarheden betreffen XXE-injectie, privilege-escalatie en authentication bypass. \nDe authentication bypass kwetsbaarheid bevindt zich in het peering authenticatiemechanisme, waardoor niet-geauthenticeerde externe aanvallers verhoogde rechten kunnen verkrijgen. Hierdoor kunnen zij netwerkconfiguraties manipuleren en mogelijk netwerkoperaties verstoren.\nMet name SD-WAN controllers die poorten via publieke netwerken bereikbaar hebben lopen een verhoogd risico op misbruik.\n\nCisco meldt bekend te zijn met berichten dat de authentication bypass kwetsbaarheid beperkt en gericht is misbruikt. De verwachting van het NCSC is dat op korte termijn een toename in scan- en misbruikverkeer zal plaatsvinden.",
        "title": "Interpretaties"
      },
      {
        "category": "description",
        "text": "Cisco heeft updates uitgebracht om de kwetsbaarheid te verhelpen. Ook heeft Cisco Indicators of Compromise (IoC\u0027s) beschikbaar gesteld om eventueel misbruik te detecteren. Zie bijgevoegde referenties voor meer informatie.",
        "title": "Oplossingen"
      },
      {
        "category": "description",
        "text": "Customers are encouraged to audit the auth.log file, located at /var/log/auth.log, for entries that are related to Accepted publickey for vmanage-admin from unknown or unauthorized IP addresses, as shown in the following example:\n\n`2026-02-10T22:51:36+00:00 vm  sshd[804]: Accepted publickey for vmanage-admin from  port [REDACTED PORT] ssh2: RSA SHA256:[REDACTED KEY]`\n\nCustomers must check the IP address in the auth.log log file against the configured System IPs that are listed in the Cisco Catalyst SD-WAN Manager web UI in the WebUI \u003e Devices \u003e System IP column.",
        "title": "Dreigingsinformatie"
      },
      {
        "category": "general",
        "text": "high",
        "title": "Kans"
      },
      {
        "category": "general",
        "text": "high",
        "title": "Schade"
      },
      {
        "category": "general",
        "text": "Improper Authentication",
        "title": "CWE-287"
      }
    ],
    "publisher": {
      "category": "coordinator",
      "contact_details": "cert@ncsc.nl",
      "name": "Nationaal Cyber Security Centrum",
      "namespace": "https://www.ncsc.nl/"
    },
    "references": [
      {
        "category": "external",
        "summary": "Reference",
        "url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sdwan-mltvnps2-JxpWm7R"
      },
      {
        "category": "external",
        "summary": "Reference",
        "url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sdwan-rpa2-v69WY2SW"
      }
    ],
    "title": "Kwetsbaarheden verholpen in Cisco Catalyst SD-WAN Controller en Manager",
    "tracking": {
      "current_release_date": "2026-05-15T08:19:51.137228Z",
      "generator": {
        "date": "2025-08-04T16:30:00Z",
        "engine": {
          "name": "V.A.",
          "version": "1.3"
        }
      },
      "id": "NCSC-2026-0157",
      "initial_release_date": "2026-05-15T06:46:01.859850Z",
      "revision_history": [
        {
          "date": "2026-05-15T06:46:01.859850Z",
          "number": "1.0.0",
          "summary": "Initiele versie"
        },
        {
          "date": "2026-05-15T08:19:51.137228Z",
          "number": "1.0.1",
          "summary": "CVE-2026-20209, CVE-2026-20210, CVE-2026-20224 toegevoegd."
        }
      ],
      "status": "final",
      "version": "1.0.1"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "vers:unknown/*",
                "product": {
                  "name": "vers:unknown/*",
                  "product_id": "CSAFPID-1"
                }
              }
            ],
            "category": "product_name",
            "name": "Catalyst SD-WAN"
          },
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "vers:unknown/*",
                "product": {
                  "name": "vers:unknown/*",
                  "product_id": "CSAFPID-2"
                }
              }
            ],
            "category": "product_name",
            "name": "Catalyst SD-WAN Manager"
          }
        ],
        "category": "vendor",
        "name": "Cisco"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2026-20209",
      "cwe": {
        "id": "CWE-779",
        "name": "Logging of Excessive Data"
      },
      "notes": [
        {
          "category": "other",
          "text": "Logging of Excessive Data",
          "title": "CWE-779"
        },
        {
          "category": "description",
          "text": "Multiple vulnerabilities in Cisco Catalyst SD-WAN Manager, including a privilege escalation flaw via audit log session data, allow remote attackers to access sensitive information and gain unauthorized high-level privileges.",
          "title": "Summary"
        }
      ],
      "product_status": {
        "known_affected": [
          "CSAFPID-1",
          "CSAFPID-2"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "CVE-2026-20209 | NCSC-NL Website",
          "url": "https://vulnerabilities.ncsc.nl/csaf/v2/2026/cve-2026-20209.json"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 5.4,
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N",
            "version": "3.1"
          },
          "products": [
            "CSAFPID-1",
            "CSAFPID-2"
          ]
        }
      ],
      "title": "CVE-2026-20209"
    },
    {
      "cve": "CVE-2026-20224",
      "cwe": {
        "id": "CWE-779",
        "name": "Logging of Excessive Data"
      },
      "notes": [
        {
          "category": "other",
          "text": "Logging of Excessive Data",
          "title": "CWE-779"
        },
        {
          "category": "description",
          "text": "Multiple vulnerabilities in Cisco Catalyst SD-WAN Manager, including an XML External Entity (XXE) injection in its web UI, allow unauthenticated remote attackers to access sensitive information, elevate privileges, and gain unauthorized application access.",
          "title": "Summary"
        }
      ],
      "product_status": {
        "known_affected": [
          "CSAFPID-1",
          "CSAFPID-2"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "CVE-2026-20224 | NCSC-NL Website",
          "url": "https://vulnerabilities.ncsc.nl/csaf/v2/2026/cve-2026-20224.json"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 8.6,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N",
            "version": "3.1"
          },
          "products": [
            "CSAFPID-1",
            "CSAFPID-2"
          ]
        }
      ],
      "title": "CVE-2026-20224"
    },
    {
      "cve": "CVE-2026-20210",
      "cwe": {
        "id": "CWE-779",
        "name": "Logging of Excessive Data"
      },
      "notes": [
        {
          "category": "other",
          "text": "Logging of Excessive Data",
          "title": "CWE-779"
        },
        {
          "category": "description",
          "text": "Multiple vulnerabilities in Cisco Catalyst SD-WAN Manager, including improper redaction in the web UI, allow authenticated users with read-only access to escalate privileges, modify configurations, and gain unauthorized application access.",
          "title": "Summary"
        }
      ],
      "product_status": {
        "known_affected": [
          "CSAFPID-1",
          "CSAFPID-2"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "CVE-2026-20210 | NCSC-NL Website",
          "url": "https://vulnerabilities.ncsc.nl/csaf/v2/2026/cve-2026-20210.json"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 5.4,
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N",
            "version": "3.1"
          },
          "products": [
            "CSAFPID-1",
            "CSAFPID-2"
          ]
        }
      ],
      "title": "CVE-2026-20210"
    },
    {
      "cve": "CVE-2026-20182",
      "notes": [
        {
          "category": "description",
          "text": "A critical authentication bypass vulnerability in Cisco Catalyst SD-WAN Controller and Manager allows unauthenticated remote attackers to gain administrative privileges and manipulate network configurations.",
          "title": "Summary"
        }
      ],
      "product_status": {
        "known_affected": [
          "CSAFPID-1",
          "CSAFPID-2"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "CVE-2026-20182 | NCSC-NL Website",
          "url": "https://vulnerabilities.ncsc.nl/csaf/v2/2026/cve-2026-20182.json"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 10.0,
            "baseSeverity": "CRITICAL",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H",
            "version": "3.1"
          },
          "products": [
            "CSAFPID-1",
            "CSAFPID-2"
          ]
        }
      ],
      "title": "CVE-2026-20182"
    }
  ]
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.