CVE-2026-20129 (GCVE-0-2026-20129)

Vulnerability from cvelistv5 – Published: 2026-02-25 16:14 – Updated: 2026-02-25 19:05
VLAI?
Title
Cisco Catayst SD-WAN Authentication Bypass Vulnerability
Summary
A vulnerability in the API user authentication of Cisco Catalyst SD-WAN Manager could allow an unauthenticated, remote attacker to gain access to an affected system as a user who has the netadmin role. The vulnerability is due to improper authentication for requests that are sent to the API. An attacker could exploit this vulnerability by sending a crafted request to the API of an affected system. A successful exploit could allow the attacker to execute commands with the privileges of the netadmin role. Note: Cisco Catalyst SD-WAN Manager releases 20.18 and later are not affected by this vulnerability. 
CWE
  • CWE-287 - Improper Authentication
Assigner
Impacted products
Vendor Product Version
Cisco 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: 19.3.0
Affected: 19.2.2
Affected: 19.2.099
Affected: 18.3.6
Affected: 18.3.7
Affected: 19.2.0
Affected: 18.3.8
Affected: 19.0.0
Affected: 19.1.0
Affected: 18.4.302
Affected: 18.4.303
Affected: 19.2.097
Affected: 19.2.098
Affected: 17.2.10
Affected: 18.3.6.1
Affected: 19.0.1a
Affected: 18.2.0
Affected: 18.4.3
Affected: 18.4.1
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: 18.3.4
Affected: 17.2.5
Affected: 18.3.1.1
Affected: 18.3.5
Affected: 18.4.0.1
Affected: 18.3.3
Affected: 17.2.7
Affected: 17.2.4
Affected: 18.3.0
Affected: 19.2.3
Affected: 18.4.501_ES
Affected: 20.3.1
Affected: 20.1.2
Affected: 19.2.929
Affected: 19.2.31
Affected: 20.3.2
Affected: 19.2.32
Affected: 20.3.2_925
Affected: 20.3.2.1
Affected: 20.3.2.1_927
Affected: 18.4.6
Affected: 20.1.2_937
Affected: 20.4.1
Affected: 20.3.2_928
Affected: 20.3.2_929
Affected: 20.4.1.0.1
Affected: 20.3.2.1_930
Affected: 19.2.4
Affected: 20.5.0.1.1
Affected: 20.4.1.1
Affected: 20.3.3
Affected: 19.2.4.0.1
Affected: 20.3.2_937
Affected: 20.3.3.1
Affected: 20.5.1
Affected: 20.1.3
Affected: 20.3.3.0.4
Affected: 20.3.3.1.2
Affected: 20.3.3.1.1
Affected: 20.4.1.2
Affected: 20.3.3.0.2
Affected: 20.4.1.1.5
Affected: 20.4.1.0.01
Affected: 20.4.1.0.02
Affected: 20.3.3.1.7
Affected: 20.3.3.1.5
Affected: 20.5.1.0.1
Affected: 20.3.3.1.10
Affected: 20.3.3.0.8
Affected: 20.4.2
Affected: 20.4.2.0.1
Affected: 20.3.4
Affected: 20.3.3.0.14
Affected: 19.2.4.0.8
Affected: 19.2.4.0.9
Affected: 20.3.4.0.1
Affected: 20.3.2.0.5
Affected: 20.6.1
Affected: 20.5.1.0.2
Affected: 20.3.3.0.17
Affected: 20.6.1.1
Affected: 20.6.0.18.3
Affected: 20.3.2.0.6
Affected: 20.6.0.18.4
Affected: 20.4.2.0.2
Affected: 20.3.3.0.16
Affected: 20.3.4.0.5
Affected: 20.6.1.0.1
Affected: 20.3.4.0.6
Affected: 20.6.2
Affected: 20.7.1EFT2
Affected: 20.3.4.0.9
Affected: 20.3.4.0.11
Affected: 20.4.2.0.4
Affected: 20.3.3.0.18
Affected: 20.7.1
Affected: 20.6.2.1
Affected: 20.3.4.1
Affected: 20.5.1.1
Affected: 20.4.2.1
Affected: 20.4.2.1.1
Affected: 20.3.4.1.1
Affected: 20.3.813
Affected: 20.3.4.0.19
Affected: 20.4.2.2.1
Affected: 20.5.1.2
Affected: 20.3.4.2
Affected: 20.3.814
Affected: 20.4.2.2
Affected: 20.6.2.2
Affected: 20.3.4.2.1
Affected: 20.7.1.1
Affected: 20.3.4.1.2
Affected: 20.6.2.2.2
Affected: 20.3.4.0.20
Affected: 20.6.2.2.3
Affected: 20.4.2.2.2
Affected: 20.3.5
Affected: 20.6.2.0.4
Affected: 20.4.2.2.3
Affected: 20.3.4.0.24
Affected: 20.6.2.2.7
Affected: 20.6.3
Affected: 20.3.4.2.2
Affected: 20.4.2.2.4
Affected: 20.7.1.0.2
Affected: 20.8.1
Affected: 20.3.5.0.8
Affected: 20.3.5.0.9
Affected: 20.4.2.2.8
Affected: 20.3.5.0.7
Affected: 20.6.3.0.7
Affected: 20.6.3.0.5
Affected: 20.6.3.0.10
Affected: 20.6.3.0.2
Affected: 20.7.2
Affected: 20.9.1EFT2
Affected: 20.6.3.0.11
Affected: 20.6.3.1
Affected: 20.6.3.0.14
Affected: 20.6.4
Affected: 20.9.1
Affected: 20.6.3.0.19
Affected: 20.6.3.0.18
Affected: 20.3.6
Affected: 20.9.1.1
Affected: 20.6.3.0.23
Affected: 20.6.4.0.4
Affected: 20.6.3.0.25
Affected: 20.6.5
Affected: 20.6.3.0.27
Affected: 20.9.2
Affected: 20.9.2.1
Affected: 20.6.3.0.29
Affected: 20.6.3.0.31
Affected: 20.6.3.0.32
Affected: 20.10.1
Affected: 20.6.3.0.33
Affected: 20.9.2.0.01
Affected: 20.9.1_LI_Images
Affected: 20.10.1_LI_Images
Affected: 20.9.2_LI_Images
Affected: 20.3.7
Affected: 20.9.3
Affected: 20.6.5.1
Affected: 20.11.1
Affected: 20.11.1_LI_Images
Affected: 20.9.3_LI_ Images
Affected: 20.6.3.1.1
Affected: 20.9.3.0.2
Affected: 20.6.5.1.2
Affected: 20.9.3.0.3
Affected: 20.4.2.3
Affected: 20.6.3.2
Affected: 20.6.4.1
Affected: 20.6.3.0.38
Affected: 20.6.3.0.39
Affected: 20.3.5.1
Affected: 20.3.4.3
Affected: 20.9.3.1
Affected: 20.3.3.2
Affected: 20.6.5.2
Affected: 20.3.7.1
Affected: 20.10.1.1
Affected: 20.6.5.2.1
Affected: 20.3.4.0.25
Affected: 20.6.2.2.4
Affected: 20.6.1.2
Affected: 20.11.1.1
Affected: 20.9.3.0.5
Affected: 20.3.4.0.26
Affected: 20.6.5.1.3
Affected: 20.6.3.0.40
Affected: 20.1.3.1
Affected: 20.9.2.2
Affected: 20.6.5.2.3
Affected: 20.6.5.1.4
Affected: 20.6.5.3
Affected: 20.6.3.0.41
Affected: 20.9.3.0.7
Affected: 20.6.5.1.5
Affected: 20.9.3.0.4
Affected: 20.6.4.0.19
Affected: 20.6.5.1.6
Affected: 20.9.3.0.8
Affected: 20.6.3.3
Affected: 20.3.7.2
Affected: 20.6.5.4
Affected: 20.6.5.1.7
Affected: 20.9.3.0.12
Affected: 20.6.4.2
Affected: 20.6.5.5
Affected: 20.9.3.2
Affected: 20.11.1.2
Affected: 20.6.3.4
Affected: 20.10.1.2
Affected: 20.6.5.1.9
Affected: 20.9.3.0.16
Affected: 20.6.3.0.45
Affected: 20.6.5.1.10
Affected: 20.9.3.0.17
Affected: 20.6.5.2.4
Affected: 20.6.4.0.21
Affected: 20.9.3.0.18
Affected: 20.6.3.0.46
Affected: 20.6.3.0.47
Affected: 20.9.2.3
Affected: 20.9.3.2_LI_Images
Affected: 20.9.3.0.21
Affected: 20.9.3.0.20
Affected: 20.9.4_LI_Images
Affected: 20.9.4
Affected: 20.6.5.1.11
Affected: 20.12.1
Affected: 20.12.1_LI_Images
Affected: 20.6.5.1.13
Affected: 20.9.3.0.23
Affected: 20.6.5.2.8
Affected: 20.9.4.1
Affected: 20.9.4.1_LI_Images
Affected: 20.9.3.0.25
Affected: 20.9.3.0.24
Affected: 20.6.5.1.14
Affected: 20.3.8
Affected: 20.6.6
Affected: 20.9.3.0.26
Affected: 20.6.3.0.51
Affected: 20.9.3.0.29
Affected: 20.12.2
Affected: 20.12.2_LI_Images
Affected: 20.6.6.0.1
Affected: 20.13.1_LI_Images
Affected: 20.9.4.0.4
Affected: 20.13.1
Affected: 20.9.4.1.1
Affected: 20.9.5
Affected: 20.9.5_LI_Images
Affected: 20.12.3_LI_Images
Affected: 20.12.3
Affected: 20.9.4.1.3
Affected: 20.6.7
Affected: 20.9.5.1
Affected: 20.9.5.1_LI_Images
Affected: 20.9.4.1.6
Affected: 20.14.1
Affected: 20.14.1_LI_Images
Affected: 20.9.5.2
Affected: 20.9.5.2.1
Affected: 20.9.5.2_LI_Images
Affected: 20.12.3.1
Affected: 20.12.4
Affected: 20.15.1_LI_Images
Affected: 20.15.1
Affected: 20.9.5.1.4
Affected: 20.9.5.2.7
Affected: 20.9.5.2.13
Affected: 20.9.6
Affected: 20.9.6_LI_Images
Affected: 20.9.5.2.14
Affected: 20.6.8
Affected: 20.12.4.0.03
Affected: 20.16.1
Affected: 20.16.1_LI_Images
Affected: 20.12.4_LI_Images
Affected: 20.9.5.2.16
Affected: 20.12.4.0.4
Affected: 20.12.401
Affected: 20.9.5.3
Affected: 20.9.5.3_LI_Images
Affected: 20.12.4.1_LI_Images
Affected: 20.12.4.1
Affected: 20.9.5.2.21
Affected: 20.9.6.0.3
Affected: 20.12.4.0.6
Affected: 20.15.2_LI_Images
Affected: 20.15.2
Affected: 20.12.4_Monthly_ES5
Affected: 20.12.5
Affected: 20.12.5_LI_Images
Affected: 20.9.7_LI _Images
Affected: 20.9.7
Affected: 20.15.3
Affected: 20.15.3_ LI _Images
Affected: 20.12.501
Affected: 20.12.5.1_LI_Images
Affected: 20.12.5.1
Affected: 20.12.5.2_LI_Images
Affected: 20.12.5.2
Affected: 20.15.3.1
Affected: 20.15.4_LI_Images
Affected: 20.15.4
Affected: 20.9.7.1_LI _Images
Affected: 20.9.7.1
Affected: 20.18.1
Affected: 20.18.1_LI_Images
Affected: 20.12.6_LI_Images
Affected: 20.12.6
Affected: 20.12.5.1.01
Affected: 20.9.8
Affected: 20.9.8_LI_Images
Affected: 20.18.2
Affected: 20.15.4.1_LI_Images
Affected: 20.15.4.1
Affected: 20.18.2_LI_Images
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              "status": "affected",
              "version": "17.2.7"
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            {
              "status": "affected",
              "version": "17.2.4"
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            {
              "status": "affected",
              "version": "18.3.0"
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            {
              "status": "affected",
              "version": "19.2.3"
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            {
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              "version": "19.2.4"
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              "version": "20.4.1.1"
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              "version": "20.4.2"
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              "version": "20.3.4"
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              "version": "20.3.3.0.14"
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              "version": "19.2.4.0.8"
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              "status": "affected",
              "version": "19.2.4.0.9"
            },
            {
              "status": "affected",
              "version": "20.3.4.0.1"
            },
            {
              "status": "affected",
              "version": "20.3.2.0.5"
            },
            {
              "status": "affected",
              "version": "20.6.1"
            },
            {
              "status": "affected",
              "version": "20.5.1.0.2"
            },
            {
              "status": "affected",
              "version": "20.3.3.0.17"
            },
            {
              "status": "affected",
              "version": "20.6.1.1"
            },
            {
              "status": "affected",
              "version": "20.6.0.18.3"
            },
            {
              "status": "affected",
              "version": "20.3.2.0.6"
            },
            {
              "status": "affected",
              "version": "20.6.0.18.4"
            },
            {
              "status": "affected",
              "version": "20.4.2.0.2"
            },
            {
              "status": "affected",
              "version": "20.3.3.0.16"
            },
            {
              "status": "affected",
              "version": "20.3.4.0.5"
            },
            {
              "status": "affected",
              "version": "20.6.1.0.1"
            },
            {
              "status": "affected",
              "version": "20.3.4.0.6"
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            {
              "status": "affected",
              "version": "20.6.2"
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            {
              "status": "affected",
              "version": "20.7.1EFT2"
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            {
              "status": "affected",
              "version": "20.3.4.0.9"
            },
            {
              "status": "affected",
              "version": "20.3.4.0.11"
            },
            {
              "status": "affected",
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              "version": "20.18.1_LI_Images"
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      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "A vulnerability in the API user authentication of Cisco Catalyst SD-WAN Manager could allow an unauthenticated, remote attacker to gain access to an affected system as a user who has the\u0026nbsp;netadmin role.\r\n\r\nThe vulnerability is due to improper authentication for requests that are sent to the API. An attacker could exploit this vulnerability by sending a crafted request to the API of an affected system. A successful exploit could allow the attacker to execute commands with the privileges of the netadmin role.\r\nNote: Cisco Catalyst SD-WAN Manager releases 20.18 and later are not affected by this vulnerability.\u0026nbsp;"
        }
      ],
      "exploits": [
        {
          "lang": "en",
          "value": "The Cisco PSIRT is not aware of any public announcements or malicious use of the vulnerabilities that are described in this advisory."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 9.8,
            "baseSeverity": "CRITICAL",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "format": "cvssV3_1"
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-287",
              "description": "Improper Authentication",
              "lang": "en",
              "type": "cwe"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-02-25T16:17:41.772Z",
        "orgId": "d1c1063e-7a18-46af-9102-31f8928bc633",
        "shortName": "cisco"
      },
      "references": [
        {
          "name": "cisco-sa-sdwan-authbp-qwCX8D4v",
          "url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sdwan-authbp-qwCX8D4v"
        }
      ],
      "source": {
        "advisory": "cisco-sa-sdwan-authbp-qwCX8D4v",
        "defects": [
          "CSCws33587"
        ],
        "discovery": "INTERNAL"
      },
      "title": "Cisco Catayst SD-WAN Authentication Bypass Vulnerability"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "d1c1063e-7a18-46af-9102-31f8928bc633",
    "assignerShortName": "cisco",
    "cveId": "CVE-2026-20129",
    "datePublished": "2026-02-25T16:14:09.046Z",
    "dateReserved": "2025-10-08T11:59:15.379Z",
    "dateUpdated": "2026-02-25T19:05:52.414Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-20129\",\"sourceIdentifier\":\"psirt@cisco.com\",\"published\":\"2026-02-25T17:25:30.343\",\"lastModified\":\"2026-02-25T17:25:30.343\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"A vulnerability in the API user authentication of Cisco Catalyst SD-WAN Manager could allow an unauthenticated, remote attacker to gain access to an affected system as a user who has the\u0026nbsp;netadmin role.\\r\\n\\r\\nThe vulnerability is due to improper authentication for requests that are sent to the API. An attacker could exploit this vulnerability by sending a crafted request to the API of an affected system. A successful exploit could allow the attacker to execute commands with the privileges of the netadmin role.\\r\\nNote: Cisco Catalyst SD-WAN Manager releases 20.18 and later are not affected by this vulnerability.\u0026nbsp;\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"psirt@cisco.com\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H\",\"baseScore\":9.8,\"baseSeverity\":\"CRITICAL\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":3.9,\"impactScore\":5.9}]},\"weaknesses\":[{\"source\":\"psirt@cisco.com\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-287\"}]}],\"references\":[{\"url\":\"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sdwan-authbp-qwCX8D4v\",\"source\":\"psirt@cisco.com\"}]}}"
  }
}


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Sightings

Author Source Type Date

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.


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Detection rules are retrieved from Rulezet.

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