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CVE-2019-1233

Status: ModifiedHigh (7.5)—

A denial of service vulnerability exists in Microsoft Exchange Server software when the software fails to properly handle objects in memory, aka 'Microsoft Exchange Denial of Service Vulnerability'.

CVSS

Exploitation probability (EPSS)

EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).

Affected technologies (1)

Microsoft — Exchange Server

CWEs

References

Raw JSON (NVD)

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{
  "id": "CVE-2019-1233",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 7.8,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:C",
          "authentication": "NONE",
          "integrityImpact": "NONE",
          "accessComplexity": "LOW",
          "availabilityImpact": "COMPLETE",
          "confidentialityImpact": "NONE"
        },
        "acInsufInfo": false,
        "impactScore": 6.9,
        "baseSeverity": "HIGH",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 10,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 7.5,
          "attackVector": "NETWORK",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 3.6,
        "exploitabilityScore": 3.9
      }
    ]
  },
  "affected": [
    {
      "source": "secure@microsoft.com",
      "affectedData": [
        {
          "vendor": "Microsoft",
          "product": "Microsoft Exchange Server 2016",
          "versions": [
            {
              "status": "affected",
              "version": "Cumulative Update 12"
            },
            {
              "status": "affected",
              "version": "Cumulative Update 13"
            }
          ]
        },
        {
          "vendor": "Microsoft",
          "product": "Microsoft Exchange Server 2019",
          "versions": [
            {
              "status": "affected",
              "version": "Cumulative Update 1"
            },
            {
              "status": "affected",
              "version": "Cumulative Update 2"
            }
          ]
        }
      ]
    }
  ],
  "published": "2019-09-11T22:15:15.163",
  "references": [
    {
      "url": "https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-1233",
      "tags": [
        "Patch",
        "Vendor Advisory"
      ],
      "source": "secure@microsoft.com"
    },
    {
      "url": "https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-1233",
      "tags": [
        "Patch",
        "Vendor Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "NVD-CWE-noinfo"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "A denial of service vulnerability exists in Microsoft Exchange Server software when the software fails to properly handle objects in memory, aka 'Microsoft Exchange Denial of Service Vulnerability'."
    },
    {
      "lang": "es",
      "value": "Se presenta una vulnerabilidad de denegación de servicio en el software Microsoft Exchange Server, cuando el software no puede manejar apropiadamente los objetos en la memoria, también se conoce como \"Microsoft Exchange Denial of Service Vulnerability\"."
    }
  ],
  "lastModified": "2026-06-17T02:28:11.597",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_12:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "CCF101BE-27FD-4E2D-A694-C606BD3D1ED7"
            },
            {
              "criteria": "cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_13:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "4DF5BDB5-205D-4B64-A49A-0152AFCF4A13"
            },
            {
              "criteria": "cpe:2.3:a:microsoft:exchange_server:2019:cumulative_update_1:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "051DE6C4-7456-4C42-BC51-253208AADB4E"
            },
            {
              "criteria": "cpe:2.3:a:microsoft:exchange_server:2019:cumulative_update_2:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "EE320413-D2C9-4B28-89BF-361B44A3F0FF"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "secure@microsoft.com"
}