{
  "document": {
    "acknowledgments": [
      {
        "names": [
          "MARIOS GYFTOS"
        ]
      }
    ],
    "aggregate_severity": {
      "namespace": "https://www.microsoft.com/en-us/msrc/security-update-severity-rating-system",
      "text": "Important"
    },
    "category": "csaf_security_advisory",
    "csaf_version": "2.0",
    "distribution": {
      "text": "Public",
      "tlp": {
        "label": "WHITE",
        "url": "https://www.first.org/tlp/"
      }
    },
    "lang": "en-US",
    "notes": [
      {
        "category": "general",
        "text": "To determine the support lifecycle for your software, see the Microsoft Support Lifecycle: https://support.microsoft.com/lifecycle",
        "title": "Additional Resources"
      },
      {
        "category": "legal_disclaimer",
        "text": "The information provided in the Microsoft Knowledge Base is provided \\\"as is\\\" without warranty of any kind. Microsoft disclaims all warranties, either express or implied, including the warranties of merchantability and fitness for a particular purpose. In no event shall Microsoft Corporation or its suppliers be liable for any damages whatsoever including direct, indirect, incidental, consequential, loss of business profits or special damages, even if Microsoft Corporation or its suppliers have been advised of the possibility of such damages. Some states do not allow the exclusion or limitation of liability for consequential or incidental damages so the foregoing limitation may not apply.",
        "title": "Disclaimer"
      },
      {
        "category": "general",
        "text": "Required. The vulnerability documented by this CVE requires customer action to resolve.",
        "title": "Customer Action"
      }
    ],
    "publisher": {
      "category": "vendor",
      "contact_details": "secure@microsoft.com",
      "name": "Microsoft Security Response Center",
      "namespace": "https://msrc.microsoft.com"
    },
    "references": [
      {
        "category": "self",
        "summary": "CVE-2026-45504 Microsoft Exchange Server Elevation of Privilege Vulnerability - HTML",
        "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45504"
      },
      {
        "category": "self",
        "summary": "CVE-2026-45504 Microsoft Exchange Server Elevation of Privilege Vulnerability - CSAF",
        "url": "https://msrc.microsoft.com/csaf/advisories/2026/msrc_cve-2026-45504.json"
      },
      {
        "category": "external",
        "summary": "Microsoft Exploitability Index",
        "url": "https://www.microsoft.com/en-us/msrc/exploitability-index?rtc=1"
      },
      {
        "category": "external",
        "summary": "Microsoft Support Lifecycle",
        "url": "https://support.microsoft.com/lifecycle"
      },
      {
        "category": "external",
        "summary": "Common Vulnerability Scoring System",
        "url": "https://www.first.org/cvss"
      }
    ],
    "title": "Microsoft Exchange Server Elevation of Privilege Vulnerability",
    "tracking": {
      "current_release_date": "2026-06-09T07:00:00.000Z",
      "generator": {
        "date": "2026-06-09T17:48:04.026Z",
        "engine": {
          "name": "MSRC Generator",
          "version": "1.0"
        }
      },
      "id": "msrc_CVE-2026-45504",
      "initial_release_date": "2026-06-09T07:00:00.000Z",
      "revision_history": [
        {
          "date": "2026-06-09T07:00:00.000Z",
          "legacy_version": "1",
          "number": "1",
          "summary": "Information published."
        }
      ],
      "status": "final",
      "version": "1"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "category": "product_version_range",
            "name": "\u003c15.02.2562.043",
            "product": {
              "name": "Microsoft Exchange Server Subscription Edition RTM \u003c15.02.2562.043",
              "product_id": "1"
            }
          },
          {
            "category": "product_version",
            "name": "15.02.2562.043",
            "product": {
              "name": "Microsoft Exchange Server Subscription Edition RTM 15.02.2562.043",
              "product_id": "16792"
            }
          }
        ],
        "category": "product_name",
        "name": "Microsoft Exchange Server Subscription Edition RTM"
      },
      {
        "branches": [
          {
            "category": "product_version_range",
            "name": "\u003c15.02.1748.046",
            "product": {
              "name": "Microsoft Exchange Server 2019 Cumulative Update 15 \u003c15.02.1748.046",
              "product_id": "2"
            }
          },
          {
            "category": "product_version",
            "name": "15.02.1748.046",
            "product": {
              "name": "Microsoft Exchange Server 2019 Cumulative Update 15 15.02.1748.046",
              "product_id": "12502"
            }
          }
        ],
        "category": "product_name",
        "name": "Microsoft Exchange Server 2019 Cumulative Update 15"
      },
      {
        "branches": [
          {
            "category": "product_version_range",
            "name": "\u003c15.01.2507.069",
            "product": {
              "name": "Microsoft Exchange Server 2016 Cumulative Update 23 \u003c15.01.2507.069",
              "product_id": "4"
            }
          },
          {
            "category": "product_version",
            "name": "15.01.2507.069",
            "product": {
              "name": "Microsoft Exchange Server 2016 Cumulative Update 23 15.01.2507.069",
              "product_id": "12039"
            }
          }
        ],
        "category": "product_name",
        "name": "Microsoft Exchange Server 2016 Cumulative Update 23"
      },
      {
        "branches": [
          {
            "category": "product_version_range",
            "name": "\u003c15.02.1544.041",
            "product": {
              "name": "Microsoft Exchange Server 2019 Cumulative Update 14 \u003c15.02.1544.041",
              "product_id": "3"
            }
          },
          {
            "category": "product_version",
            "name": "15.02.1544.041",
            "product": {
              "name": "Microsoft Exchange Server 2019 Cumulative Update 14 15.02.1544.041",
              "product_id": "12293"
            }
          }
        ],
        "category": "product_name",
        "name": "Microsoft Exchange Server 2019 Cumulative Update 14"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2026-45504",
      "cwe": {
        "id": "CWE-918",
        "name": "Server-Side Request Forgery (SSRF)"
      },
      "notes": [
        {
          "category": "general",
          "text": "Microsoft",
          "title": "Assigning CNA"
        },
        {
          "category": "faq",
          "text": "An attacker could gain elevated privileges beyond those normally available to them, allowing actions such as accessing restricted information or performing operations that are typically limited to more highly privileged users or administrators.",
          "title": "What privileges could be gained by an attacker who successfully exploited the vulnerability?"
        },
        {
          "category": "faq",
          "text": "An attacker with a low-privilege user account and an assigned mailbox, could exploit weaknesses in how Exchange validates requests and identity tokens to impersonate another user. By doing so, the attacker could then access mailboxes through Exchange services as if they were that user.",
          "title": "How could an attacker exploit this vulnerability?"
        }
      ],
      "product_status": {
        "fixed": [
          "12039",
          "12293",
          "12502",
          "16792"
        ],
        "known_affected": [
          "1",
          "2",
          "3",
          "4"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "CVE-2026-45504 Microsoft Exchange Server Elevation of Privilege Vulnerability - HTML",
          "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45504"
        },
        {
          "category": "self",
          "summary": "CVE-2026-45504 Microsoft Exchange Server Elevation of Privilege Vulnerability - CSAF",
          "url": "https://msrc.microsoft.com/csaf/advisories/2026/msrc_cve-2026-45504.json"
        }
      ],
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2026-06-09T07:00:00.000Z",
          "details": "15.02.2562.043:Security Update:https://support.microsoft.com/help/5094139",
          "product_ids": [
            "1"
          ],
          "url": "https://support.microsoft.com/help/5094139"
        },
        {
          "category": "vendor_fix",
          "date": "2026-06-09T07:00:00.000Z",
          "details": "15.02.1748.046:Security Update:https://support.microsoft.com/help/5094140",
          "product_ids": [
            "2"
          ],
          "url": "https://support.microsoft.com/help/5094140"
        },
        {
          "category": "vendor_fix",
          "date": "2026-06-09T07:00:00.000Z",
          "details": "15.01.2507.069:Security Update:https://support.microsoft.com/help/5094144",
          "product_ids": [
            "4"
          ],
          "url": "https://support.microsoft.com/help/5094144"
        },
        {
          "category": "vendor_fix",
          "date": "2026-06-09T07:00:00.000Z",
          "details": "15.02.1544.041:Security Update:https://support.microsoft.com/help/5094142",
          "product_ids": [
            "3"
          ],
          "url": "https://support.microsoft.com/help/5094142"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 8.8,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "environmentalsScore": 0.0,
            "exploitCodeMaturity": "UNPROVEN",
            "integrityImpact": "HIGH",
            "privilegesRequired": "LOW",
            "remediationLevel": "OFFICIAL_FIX",
            "reportConfidence": "CONFIRMED",
            "scope": "UNCHANGED",
            "temporalScore": 7.7,
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C",
            "version": "3.1"
          },
          "products": [
            "1",
            "2",
            "3",
            "4"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Elevation of Privilege"
        },
        {
          "category": "exploit_status",
          "details": "Publicly Disclosed:No;Exploited:No;Latest Software Release:Exploitation Unlikely"
        }
      ],
      "title": "Microsoft Exchange Server Elevation of Privilege Vulnerability"
    }
  ]
}