FKIE_CVE-2026-20102

Vulnerability from fkie_nvd - Published: 2026-03-04 18:16 - Updated: 2026-06-17 10:17
Severity
6.1 (Medium) - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Summary
A vulnerability in the SAML 2.0 single sign-on (SSO) feature of Cisco Secure Firewall ASA Software and Cisco Secure Firewall Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to conduct a cross-site scripting (XSS) attack against the SAML feature and access sensitive, browser-based information. This vulnerability is due to insufficient input validation of multiple HTTP parameters. An attacker could exploit this vulnerability by persuading a user to access a malicious link. A successful exploit could allow the attacker to conduct a reflected XSS attack through an affected device.
References
psirt@cisco.comhttps://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asaftd-saml-LktTrwZPVendor Advisory
Impacted products
Vendor Product Version
cisco adaptive_security_appliance_software *
cisco adaptive_security_appliance_software *
cisco adaptive_security_appliance_software *
cisco adaptive_security_appliance_software *
cisco adaptive_security_appliance_software *
cisco firepower_threat_defense_software *
cisco firepower_threat_defense_software *
cisco firepower_threat_defense_software *
cisco firepower_threat_defense_software *
To clipboard 

{
  "affected": [
    {
      "affectedData": [
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          "product": "Cisco Secure Firewall Adaptive Security Appliance (ASA) Software",
          "vendor": "Cisco",
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              "version": "9.16.2"
            },
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            },
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              "version": "9.16.2.7"
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            },
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              "version": "9.16.2.13"
            },
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              "version": "9.16.2.14"
            },
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              "status": "affected",
              "version": "9.17.1.7"
            },
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            },
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              "version": "9.17.1.10"
            },
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            },
            {
              "status": "affected",
              "version": "9.17.1.13"
            },
            {
              "status": "affected",
              "version": "9.17.1.15"
            },
            {
              "status": "affected",
              "version": "9.17.1.20"
            },
            {
              "status": "affected",
              "version": "9.17.1.30"
            },
            {
              "status": "affected",
              "version": "9.17.1.33"
            },
            {
              "status": "affected",
              "version": "9.17.1.39"
            },
            {
              "status": "affected",
              "version": "9.17.1.45"
            },
            {
              "status": "affected",
              "version": "9.17.1.46"
            },
            {
              "status": "affected",
              "version": "9.23.1.13"
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              "version": "9.20.4.7"
            },
            {
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            },
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              "version": "9.18.4.66"
            },
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            },
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            },
            {
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            }
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        },
        {
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          "vendor": "Cisco",
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              "version": "7.0.0"
            },
            {
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            },
            {
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            {
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            {
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            },
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              "version": "7.1.0.1"
            },
            {
              "status": "affected",
              "version": "7.1.0.2"
            },
            {
              "status": "affected",
              "version": "7.1.0.3"
            }
          ]
        }
      ],
      "source": "psirt@cisco.com"
    }
  ],
  "configurations": [
    {
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              "versionEndExcluding": "9.23.1.26",
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          "operator": "OR"
        }
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    },
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  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "A vulnerability in the SAML 2.0 single sign-on (SSO) feature of Cisco Secure Firewall ASA Software and Cisco Secure Firewall Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to conduct a cross-site scripting (XSS) attack against the SAML feature and access sensitive, browser-based information.\r\n\r\nThis vulnerability is due to insufficient input validation of multiple HTTP parameters. An attacker could exploit this vulnerability by persuading a user to access a malicious link. A successful exploit could allow the attacker\u0026nbsp;to conduct a reflected XSS attack through an affected device."
    },
    {
      "lang": "es",
      "value": "Una vulnerabilidad en la funci\u00f3n de inicio de sesi\u00f3n \u00fanico (SSO) SAML 2.0 de Cisco Secure Firewall ASA Software y Cisco Secure Firewall Threat Defense (FTD) Software podr\u00eda permitir a un atacante remoto no autenticado realizar un ataque de cross-site scripting (XSS) contra la funci\u00f3n SAML y acceder a informaci\u00f3n sensible basada en el navegador.\n\nEsta vulnerabilidad se debe a una validaci\u00f3n de entrada insuficiente de m\u00faltiples par\u00e1metros HTTP. Un atacante podr\u00eda explotar esta vulnerabilidad persuadiendo a un usuario para que acceda a un enlace malicioso. Un exploit exitoso podr\u00eda permitir al atacante realizar un ataque XSS reflejado a trav\u00e9s de un dispositivo afectado."
    }
  ],
  "id": "CVE-2026-20102",
  "lastModified": "2026-06-17T10:17:06.360",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 6.1,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "LOW",
          "integrityImpact": "LOW",
          "privilegesRequired": "NONE",
          "scope": "CHANGED",
          "userInteraction": "REQUIRED",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 2.8,
        "impactScore": 2.7,
        "source": "psirt@cisco.com",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-20102",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-03-04T18:09:12.628315Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-03-04T18:16:25.620",
  "references": [
    {
      "source": "psirt@cisco.com",
      "tags": [
        "Vendor Advisory"
      ],
      "url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asaftd-saml-LktTrwZP"
    }
  ],
  "sourceIdentifier": "psirt@cisco.com",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-79"
        }
      ],
      "source": "psirt@cisco.com",
      "type": "Secondary"
    }
  ]
}


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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

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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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