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CVE-2026-76434 (GCVE-0-2026-76434)

Vulnerability from cvelistv5 – Published: 2026-09-16 20:19 – Updated: 2026-09-17 16:00
VLAI
Title
Cisco Identity Services Engine Arbitrary File Read Vulnerability
Summary
A vulnerability in the certificate import functionality of the web-based management interface of Cisco ISE and Cisco ISE-PIC could allow an authenticated, remote attacker to read arbitrary files from the affected system. To exploit this vulnerability, the attacker must have valid administrative credentials. This vulnerability is due to insufficient validation of user-supplied input by the affected feature. An attacker could exploit this vulnerability by sending a crafted request to the web-based management interface of an affected device. A successful exploit could allow the attacker to read arbitrary files from the affected device, which could contain sensitive information.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-17 16:00 UTC
CWE
  • CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Impacted products
Vendor Product Version CPE status
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
Affected: 3.5.0
Affected: 3.4 Patch 4
Affected: 3.3 Patch 8
Affected: 3.2 Patch 8
Affected: 3.5 Patch 1
Affected: 3.3 Patch 9
Affected: 3.2 Patch 9
Affected: 3.4 Patch 5
Affected: 3.5 Patch 3
Affected: 3.5 Patch 2
Affected: 3.3 Patch 10
Affected: 3.3 Patch 11
Affected: 3.4 Patch 6
Affected: 3.2 Patch 10
Affected: 3.1.0 p72
Affected: 3.1.0 p11
guessed Create a notification for this product.
Cisco Cisco ISE Passive Identity Connector Affected: 3.2.0
Affected: 3.1.0
Affected: 3.3.0
Affected: 3.4.0
Affected: 3.5.0
guessed Create a notification for this product.
Show details on NVD website

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                  "version": "3.4 Patch 4"
                },
                {
                  "status": "affected",
                  "version": "3.3 Patch 8"
                },
                {
                  "status": "affected",
                  "version": "3.2 Patch 8"
                },
                {
                  "status": "affected",
                  "version": "3.5 Patch 1"
                },
                {
                  "status": "affected",
                  "version": "3.3 Patch 9"
                },
                {
                  "status": "affected",
                  "version": "3.2 Patch 9"
                },
                {
                  "status": "affected",
                  "version": "3.4 Patch 5"
                },
                {
                  "status": "affected",
                  "version": "3.5 Patch 3"
                },
                {
                  "status": "affected",
                  "version": "3.5 Patch 2"
                },
                {
                  "status": "affected",
                  "version": "3.3 Patch 10"
                },
                {
                  "status": "affected",
                  "version": "3.3 Patch 11"
                },
                {
                  "status": "affected",
                  "version": "3.4 Patch 6"
                },
                {
                  "status": "affected",
                  "version": "3.2 Patch 10"
                },
                {
                  "status": "affected",
                  "version": "3.1.0 p72"
                },
                {
                  "status": "affected",
                  "version": "3.1.0 p11"
                }
              ]
            },
            {
              "defaultStatus": "unknown",
              "product": "Cisco ISE Passive Identity Connector",
              "vendor": "Cisco",
              "versions": [
                {
                  "status": "affected",
                  "version": "3.2.0"
                },
                {
                  "status": "affected",
                  "version": "3.1.0"
                },
                {
                  "status": "affected",
                  "version": "3.3.0"
                },
                {
                  "status": "affected",
                  "version": "3.4.0"
                },
                {
                  "status": "affected",
                  "version": "3.5.0"
                }
              ]
            }
          ],
          "descriptions": [
            {
              "lang": "en",
              "value": "A vulnerability in the certificate import functionality of the web-based management interface of Cisco ISE and Cisco ISE-PIC could allow an authenticated, remote attacker to read arbitrary files from the affected system. To exploit this vulnerability, the attacker must have valid administrative credentials.\r\n\r\nThis vulnerability is due to insufficient validation of user-supplied input by the affected feature. An attacker could exploit this vulnerability by sending a crafted request to the web-based management interface of an affected device. A successful exploit could allow the attacker to read arbitrary files from the affected device, which could contain sensitive information."
            }
          ],
          "exploits": [
            {
              "lang": "en",
              "value": "The Cisco PSIRT is aware that a public announcement is available for the vulnerabilities that are described in this advisory.\r\n\r\nThe Cisco PSIRT is not aware of any malicious use of the vulnerabilities that are 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-22",
                  "description": "Improper Limitation of a Pathname to a Restricted Directory (\u0027Path Traversal\u0027)",
                  "lang": "en",
                  "type": "cwe"
                }
              ]
            }
          ],
          "providerMetadata": {
            "dateUpdated": "2026-09-16T20:19:20.051Z",
            "orgId": "d1c1063e-7a18-46af-9102-31f8928bc633",
            "shortName": "cisco"
          },
          "references": [
            {
              "name": "cisco-sa-ise-multi-traversal-WDTgYCdn",
              "url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ise-multi-traversal-WDTgYCdn"
            }
          ],
          "source": {
            "advisory": "cisco-sa-ise-multi-traversal-WDTgYCdn",
            "defects": [
              "CSCwu73820"
            ],
            "discovery": "EXTERNAL"
          },
          "title": "Cisco Identity Services Engine Arbitrary File Read Vulnerability"
        }
      },
      "cveMetadata": {
        "assignerOrgId": "d1c1063e-7a18-46af-9102-31f8928bc633",
        "assignerShortName": "cisco",
        "cveId": "CVE-2026-76434",
        "datePublished": "2026-09-16T20:19:20.051Z",
        "dateReserved": "2026-08-19T12:02:03.634Z",
        "dateUpdated": "2026-09-17T16:00:42.108Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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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.

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Detection rules are retrieved from Rulezet.

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Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.


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