Vulnerability-Lookup

GHSA-F26C-V5JJ-MJ89

Vulnerability from github – Published: 2026-01-07 18:30 – Updated: 2026-01-07 18:30

Details

This vulnerability is due to improper parsing of XML that is processed by the web-based management interface of Cisco ISE and Cisco ISE-PIC. An attacker could exploit this vulnerability by uploading a malicious file to the application. A successful exploit could allow the attacker to read arbitrary files from the underlying operating system that could include sensitive data that should otherwise be inaccessible even to administrators. To exploit this vulnerability, the attacker must have valid administrative credentials.

Severity ?

4.9 (Medium)


                  
                    CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N

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{
  "affected": [],
  "aliases": [
    "CVE-2026-20029"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-611"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-01-07T17:16:03Z",
    "severity": "MODERATE"
  },
  "details": "A vulnerability in the licensing features of\u0026nbsp;Cisco Identity Services Engine (ISE) and Cisco ISE Passive Identity Connector (ISE-PIC) could allow an authenticated, remote attacker with administrative privileges to gain access to sensitive information.\u0026nbsp;\n\nThis vulnerability is due to improper parsing of XML that is processed by the web-based management interface of Cisco ISE and Cisco ISE-PIC. An attacker could exploit this vulnerability by uploading a malicious file to the application. A successful exploit could allow the attacker to read arbitrary files from the underlying operating system that could include sensitive data that should otherwise be inaccessible even to administrators. To exploit this vulnerability, the attacker must have valid administrative credentials.",
  "id": "GHSA-f26c-v5jj-mj89",
  "modified": "2026-01-07T18:30:26Z",
  "published": "2026-01-07T18:30:26Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-20029"
    },
    {
      "type": "WEB",
      "url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ise-xxe-jWSbSDKt"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2026-20029 (GCVE-0-2026-20029)

Vulnerability from cvelistv5 – Published: 2026-01-07 16:23 – Updated: 2026-01-07 16:40

Title

Cisco Identity Services Engine XML External Entity Processing Information Disclosure Vulnerability

Summary

A vulnerability in the licensing features of Cisco Identity Services Engine (ISE) and Cisco ISE Passive Identity Connector (ISE-PIC) could allow an authenticated, remote attacker with administrative privileges to gain access to sensitive information.  This vulnerability is due to improper parsing of XML that is processed by the web-based management interface of Cisco ISE and Cisco ISE-PIC. An attacker could exploit this vulnerability by uploading a malicious file to the application. A successful exploit could allow the attacker to read arbitrary files from the underlying operating system that could include sensitive data that should otherwise be inaccessible even to administrators. To exploit this vulnerability, the attacker must have valid administrative credentials.

Severity ?

4.9 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N

CWE

CWE-611 - Improper Restriction of XML External Entity Reference

Assigner

cisco

References

URL

Tags

https://sec.cloudapps.cisco.com/security/center/c…

Impacted products

	Vendor	Product	Version
	Cisco	Cisco Identity Services Engine Software	Affected: 3.1.0 Affected: 3.1.0 p1 Affected: 3.1.0 p3 Affected: 3.1.0 p2 Affected: 3.2.0 Affected: 3.1.0 p4 Affected: 3.1.0 p5 Affected: 3.2.0 p1 Affected: 3.1.0 p6 Affected: 3.2.0 p2 Affected: 3.1.0 p7 Affected: 3.3.0 Affected: 3.2.0 p3 Affected: 3.2.0 p4 Affected: 3.1.0 p8 Affected: 3.2.0 p5 Affected: 3.2.0 p6 Affected: 3.1.0 p9 Affected: 3.3 Patch 2 Affected: 3.3 Patch 1 Affected: 3.3 Patch 3 Affected: 3.4.0 Affected: 3.2.0 p7 Affected: 3.3 Patch 4 Affected: 3.4 Patch 1 Affected: 3.1.0 p10 Affected: 3.3 Patch 5 Affected: 3.3 Patch 6 Affected: 3.4 Patch 2 Affected: 3.3 Patch 7 Affected: 3.4 Patch 3

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JSON

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{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-20029",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-01-07T16:40:33.564050Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-01-07T16:40:58.555Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unknown",
          "product": "Cisco Identity Services Engine Software",
          "vendor": "Cisco",
          "versions": [
            {
              "status": "affected",
              "version": "3.1.0"
            },
            {
              "status": "affected",
              "version": "3.1.0 p1"
            },
            {
              "status": "affected",
              "version": "3.1.0 p3"
            },
            {
              "status": "affected",
              "version": "3.1.0 p2"
            },
            {
              "status": "affected",
              "version": "3.2.0"
            },
            {
              "status": "affected",
              "version": "3.1.0 p4"
            },
            {
              "status": "affected",
              "version": "3.1.0 p5"
            },
            {
              "status": "affected",
              "version": "3.2.0 p1"
            },
            {
              "status": "affected",
              "version": "3.1.0 p6"
            },
            {
              "status": "affected",
              "version": "3.2.0 p2"
            },
            {
              "status": "affected",
              "version": "3.1.0 p7"
            },
            {
              "status": "affected",
              "version": "3.3.0"
            },
            {
              "status": "affected",
              "version": "3.2.0 p3"
            },
            {
              "status": "affected",
              "version": "3.2.0 p4"
            },
            {
              "status": "affected",
              "version": "3.1.0 p8"
            },
            {
              "status": "affected",
              "version": "3.2.0 p5"
            },
            {
              "status": "affected",
              "version": "3.2.0 p6"
            },
            {
              "status": "affected",
              "version": "3.1.0 p9"
            },
            {
              "status": "affected",
              "version": "3.3 Patch 2"
            },
            {
              "status": "affected",
              "version": "3.3 Patch 1"
            },
            {
              "status": "affected",
              "version": "3.3 Patch 3"
            },
            {
              "status": "affected",
              "version": "3.4.0"
            },
            {
              "status": "affected",
              "version": "3.2.0 p7"
            },
            {
              "status": "affected",
              "version": "3.3 Patch 4"
            },
            {
              "status": "affected",
              "version": "3.4 Patch 1"
            },
            {
              "status": "affected",
              "version": "3.1.0 p10"
            },
            {
              "status": "affected",
              "version": "3.3 Patch 5"
            },
            {
              "status": "affected",
              "version": "3.3 Patch 6"
            },
            {
              "status": "affected",
              "version": "3.4 Patch 2"
            },
            {
              "status": "affected",
              "version": "3.3 Patch 7"
            },
            {
              "status": "affected",
              "version": "3.4 Patch 3"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "A vulnerability in the licensing features of\u0026nbsp;Cisco Identity Services Engine (ISE) and Cisco ISE Passive Identity Connector (ISE-PIC) could allow an authenticated, remote attacker with administrative privileges to gain access to sensitive information.\u0026nbsp;\r\n\r\nThis vulnerability is due to improper parsing of XML that is processed by the web-based management interface of Cisco ISE and Cisco ISE-PIC. An attacker could exploit this vulnerability by uploading a malicious file to the application. A successful exploit could allow the attacker to read arbitrary files from the underlying operating system that could include sensitive data that should otherwise be inaccessible even to administrators. To exploit this vulnerability, the attacker must have valid administrative credentials."
        }
      ],
      "exploits": [
        {
          "lang": "en",
          "value": "The Cisco PSIRT is aware that proof-of-concept exploit code is available for the vulnerability described in this advisory.\r\n\r\nThe Cisco PSIRT is not aware of any malicious use of the vulnerability that is described in this advisory."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 4.9,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "NONE",
            "privilegesRequired": "HIGH",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N",
            "version": "3.1"
          },
          "format": "cvssV3_1"
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-611",
              "description": "Improper Restriction of XML External Entity Reference",
              "lang": "en",
              "type": "cwe"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-01-07T16:23:43.372Z",
        "orgId": "d1c1063e-7a18-46af-9102-31f8928bc633",
        "shortName": "cisco"
      },
      "references": [
        {
          "name": "cisco-sa-ise-xxe-jWSbSDKt",
          "url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ise-xxe-jWSbSDKt"
        }
      ],
      "source": {
        "advisory": "cisco-sa-ise-xxe-jWSbSDKt",
        "defects": [
          "CSCwq79739"
        ],
        "discovery": "EXTERNAL"
      },
      "title": "Cisco Identity Services Engine XML External Entity Processing Information Disclosure Vulnerability"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "d1c1063e-7a18-46af-9102-31f8928bc633",
    "assignerShortName": "cisco",
    "cveId": "CVE-2026-20029",
    "datePublished": "2026-01-07T16:23:43.372Z",
    "dateReserved": "2025-10-08T11:59:15.353Z",
    "dateUpdated": "2026-01-07T16:40:58.555Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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.

Detection rules are retrieved from Rulezet.

Action not permitted

GHSA-F26C-V5JJ-MJ89

CVE-2026-20029 (GCVE-0-2026-20029)

Tags

Sightings

Nomenclature