fkie_cve-2021-26855
Vulnerability from fkie_nvd
Published
2021-03-03 00:15
Modified
2025-03-07 15:38
Severity ?
9.1 (Critical) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
9.8 (Critical) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Summary
Microsoft Exchange Server Remote Code Execution Vulnerability
References
secure@microsoft.comhttp://packetstormsecurity.com/files/161846/Microsoft-Exchange-2019-SSRF-Arbitrary-File-Write.htmlExploit, Third Party Advisory, VDB Entry
secure@microsoft.comhttp://packetstormsecurity.com/files/161938/Microsoft-Exchange-ProxyLogon-Remote-Code-Execution.htmlExploit, Third Party Advisory, VDB Entry
secure@microsoft.comhttp://packetstormsecurity.com/files/162610/Microsoft-Exchange-2019-Unauthenticated-Email-Download.htmlExploit, Third Party Advisory, VDB Entry
secure@microsoft.comhttp://packetstormsecurity.com/files/162736/Microsoft-Exchange-ProxyLogon-Collector.htmlExploit, Third Party Advisory, VDB Entry
secure@microsoft.comhttps://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-26855Patch, Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108http://packetstormsecurity.com/files/161846/Microsoft-Exchange-2019-SSRF-Arbitrary-File-Write.htmlExploit, Third Party Advisory, VDB Entry
af854a3a-2127-422b-91ae-364da2661108http://packetstormsecurity.com/files/161938/Microsoft-Exchange-ProxyLogon-Remote-Code-Execution.htmlExploit, Third Party Advisory, VDB Entry
af854a3a-2127-422b-91ae-364da2661108http://packetstormsecurity.com/files/162610/Microsoft-Exchange-2019-Unauthenticated-Email-Download.htmlExploit, Third Party Advisory, VDB Entry
af854a3a-2127-422b-91ae-364da2661108http://packetstormsecurity.com/files/162736/Microsoft-Exchange-ProxyLogon-Collector.htmlExploit, Third Party Advisory, VDB Entry
af854a3a-2127-422b-91ae-364da2661108https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-26855Patch, Vendor Advisory
Impacted products
Vendor Product Version
microsoft exchange_server 2013
microsoft exchange_server 2013
microsoft exchange_server 2013
microsoft exchange_server 2016
microsoft exchange_server 2016
microsoft exchange_server 2016
microsoft exchange_server 2016
microsoft exchange_server 2016
microsoft exchange_server 2016
microsoft exchange_server 2016
microsoft exchange_server 2016
microsoft exchange_server 2016
microsoft exchange_server 2016
microsoft exchange_server 2016
microsoft exchange_server 2016
microsoft exchange_server 2019
microsoft exchange_server 2019
microsoft exchange_server 2019
microsoft exchange_server 2019
microsoft exchange_server 2019
microsoft exchange_server 2019
microsoft exchange_server 2019
microsoft exchange_server 2019
microsoft exchange_server 2019


To clipboard 

{
   cisaActionDue: "2021-04-16",
   cisaExploitAdd: "2021-11-03",
   cisaRequiredAction: "Apply updates per vendor instructions.",
   cisaVulnerabilityName: "Microsoft Exchange Server Remote Code Execution Vulnerability",
   configurations: [
      {
         nodes: [
            {
               cpeMatch: [
                  {
                     criteria: "cpe:2.3:a:microsoft:exchange_server:2013:cumulative_update_21:*:*:*:*:*:*",
                     matchCriteriaId: "B560F8FD-068E-4A16-A37F-A62DCE88FCF2",
                     vulnerable: true,
                  },
                  {
                     criteria: "cpe:2.3:a:microsoft:exchange_server:2013:cumulative_update_22:*:*:*:*:*:*",
                     matchCriteriaId: "751FD35F-2ECD-4B75-9589-988CC6AD3058",
                     vulnerable: true,
                  },
                  {
                     criteria: "cpe:2.3:a:microsoft:exchange_server:2013:cumulative_update_23:*:*:*:*:*:*",
                     matchCriteriaId: "DA166F2A-D83B-4D50-AD0B-668D813E0585",
                     vulnerable: true,
                  },
                  {
                     criteria: "cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_10:*:*:*:*:*:*",
                     matchCriteriaId: "63E362CB-CF75-4B7E-A4B1-D6D84AFCBB68",
                     vulnerable: true,
                  },
                  {
                     criteria: "cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_11:*:*:*:*:*:*",
                     matchCriteriaId: "9BE04790-85A2-4078-88CE-1787BC5172E7",
                     vulnerable: true,
                  },
                  {
                     criteria: "cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_12:*:*:*:*:*:*",
                     matchCriteriaId: "CCF101BE-27FD-4E2D-A694-C606BD3D1ED7",
                     vulnerable: true,
                  },
                  {
                     criteria: "cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_13:*:*:*:*:*:*",
                     matchCriteriaId: "4DF5BDB5-205D-4B64-A49A-0152AFCF4A13",
                     vulnerable: true,
                  },
                  {
                     criteria: "cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_14:*:*:*:*:*:*",
                     matchCriteriaId: "55284CF7-0D04-4216-83FE-4B1F9CA94207",
                     vulnerable: true,
                  },
                  {
                     criteria: "cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_15:*:*:*:*:*:*",
                     matchCriteriaId: "CA2CE223-AA49-49E6-AC32-59270EFF55AD",
                     vulnerable: true,
                  },
                  {
                     criteria: "cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_16:*:*:*:*:*:*",
                     matchCriteriaId: "4830D6A9-AF74-480C-8F69-8648CD619980",
                     vulnerable: true,
                  },
                  {
                     criteria: "cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_17:*:*:*:*:*:*",
                     matchCriteriaId: "079E1E3F-FF25-4B0D-AC98-191D6455A014",
                     vulnerable: true,
                  },
                  {
                     criteria: "cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_18:*:*:*:*:*:*",
                     matchCriteriaId: "29805EC7-6403-44B9-91EC-109C087E98EB",
                     vulnerable: true,
                  },
                  {
                     criteria: "cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_19:*:*:*:*:*:*",
                     matchCriteriaId: "28FCA0E8-7D27-4746-9731-91B834CA3E64",
                     vulnerable: true,
                  },
                  {
                     criteria: "cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_8:*:*:*:*:*:*",
                     matchCriteriaId: "075E907F-AF2F-4C31-86C7-51972BE412A1",
                     vulnerable: true,
                  },
                  {
                     criteria: "cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_9:*:*:*:*:*:*",
                     matchCriteriaId: "69AF19DC-3D65-49A8-A85F-511085CDF27B",
                     vulnerable: true,
                  },
                  {
                     criteria: "cpe:2.3:a:microsoft:exchange_server:2019:-:*:*:*:*:*:*",
                     matchCriteriaId: "40D8A6DB-9225-4A3F-AD76-192F6CCCF002",
                     vulnerable: true,
                  },
                  {
                     criteria: "cpe:2.3:a:microsoft:exchange_server:2019:cumulative_update_1:*:*:*:*:*:*",
                     matchCriteriaId: "051DE6C4-7456-4C42-BC51-253208AADB4E",
                     vulnerable: true,
                  },
                  {
                     criteria: "cpe:2.3:a:microsoft:exchange_server:2019:cumulative_update_2:*:*:*:*:*:*",
                     matchCriteriaId: "EE320413-D2C9-4B28-89BF-361B44A3F0FF",
                     vulnerable: true,
                  },
                  {
                     criteria: "cpe:2.3:a:microsoft:exchange_server:2019:cumulative_update_3:*:*:*:*:*:*",
                     matchCriteriaId: "104F96DC-E280-4E0A-8586-B043B55888C2",
                     vulnerable: true,
                  },
                  {
                     criteria: "cpe:2.3:a:microsoft:exchange_server:2019:cumulative_update_4:*:*:*:*:*:*",
                     matchCriteriaId: "73B3B3FE-7E85-4B86-A983-2C410FFEF4B8",
                     vulnerable: true,
                  },
                  {
                     criteria: "cpe:2.3:a:microsoft:exchange_server:2019:cumulative_update_5:*:*:*:*:*:*",
                     matchCriteriaId: "8A9FB275-7F17-48B2-B528-BE89309D2AF5",
                     vulnerable: true,
                  },
                  {
                     criteria: "cpe:2.3:a:microsoft:exchange_server:2019:cumulative_update_6:*:*:*:*:*:*",
                     matchCriteriaId: "D4AB3C25-CEA8-4D66-AEE4-953C8B17911A",
                     vulnerable: true,
                  },
                  {
                     criteria: "cpe:2.3:a:microsoft:exchange_server:2019:cumulative_update_7:*:*:*:*:*:*",
                     matchCriteriaId: "36CE5C6D-9A04-41F5-AE7C-265779833649",
                     vulnerable: true,
                  },
                  {
                     criteria: "cpe:2.3:a:microsoft:exchange_server:2019:cumulative_update_8:*:*:*:*:*:*",
                     matchCriteriaId: "44ECF39A-1DE1-4870-A494-06A53494338D",
                     vulnerable: true,
                  },
               ],
               negate: false,
               operator: "OR",
            },
         ],
      },
   ],
   cveTags: [],
   descriptions: [
      {
         lang: "en",
         value: "Microsoft Exchange Server Remote Code Execution Vulnerability",
      },
      {
         lang: "es",
         value: "Una Vulnerabilidad de Ejecución de código remota de Microsoft Exchange Server. Este ID de CVE es diferente de CVE-2021-26412, CVE-2021-26854, CVE-2021-26857, CVE-2021-26858, CVE-2021-27065, CVE-2021-27078",
      },
   ],
   id: "CVE-2021-26855",
   lastModified: "2025-03-07T15:38:25.600",
   metrics: {
      cvssMetricV2: [
         {
            acInsufInfo: false,
            baseSeverity: "HIGH",
            cvssData: {
               accessComplexity: "LOW",
               accessVector: "NETWORK",
               authentication: "NONE",
               availabilityImpact: "PARTIAL",
               baseScore: 7.5,
               confidentialityImpact: "PARTIAL",
               integrityImpact: "PARTIAL",
               vectorString: "AV:N/AC:L/Au:N/C:P/I:P/A:P",
               version: "2.0",
            },
            exploitabilityScore: 10,
            impactScore: 6.4,
            obtainAllPrivilege: false,
            obtainOtherPrivilege: false,
            obtainUserPrivilege: false,
            source: "nvd@nist.gov",
            type: "Primary",
            userInteractionRequired: false,
         },
      ],
      cvssMetricV31: [
         {
            cvssData: {
               attackComplexity: "LOW",
               attackVector: "NETWORK",
               availabilityImpact: "NONE",
               baseScore: 9.1,
               baseSeverity: "CRITICAL",
               confidentialityImpact: "HIGH",
               integrityImpact: "HIGH",
               privilegesRequired: "NONE",
               scope: "UNCHANGED",
               userInteraction: "NONE",
               vectorString: "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N",
               version: "3.1",
            },
            exploitabilityScore: 3.9,
            impactScore: 5.2,
            source: "secure@microsoft.com",
            type: "Secondary",
         },
         {
            cvssData: {
               attackComplexity: "LOW",
               attackVector: "NETWORK",
               availabilityImpact: "HIGH",
               baseScore: 9.8,
               baseSeverity: "CRITICAL",
               confidentialityImpact: "HIGH",
               integrityImpact: "HIGH",
               privilegesRequired: "NONE",
               scope: "UNCHANGED",
               userInteraction: "NONE",
               vectorString: "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
               version: "3.1",
            },
            exploitabilityScore: 3.9,
            impactScore: 5.9,
            source: "nvd@nist.gov",
            type: "Secondary",
         },
      ],
   },
   published: "2021-03-03T00:15:12.103",
   references: [
      {
         source: "secure@microsoft.com",
         tags: [
            "Exploit",
            "Third Party Advisory",
            "VDB Entry",
         ],
         url: "http://packetstormsecurity.com/files/161846/Microsoft-Exchange-2019-SSRF-Arbitrary-File-Write.html",
      },
      {
         source: "secure@microsoft.com",
         tags: [
            "Exploit",
            "Third Party Advisory",
            "VDB Entry",
         ],
         url: "http://packetstormsecurity.com/files/161938/Microsoft-Exchange-ProxyLogon-Remote-Code-Execution.html",
      },
      {
         source: "secure@microsoft.com",
         tags: [
            "Exploit",
            "Third Party Advisory",
            "VDB Entry",
         ],
         url: "http://packetstormsecurity.com/files/162610/Microsoft-Exchange-2019-Unauthenticated-Email-Download.html",
      },
      {
         source: "secure@microsoft.com",
         tags: [
            "Exploit",
            "Third Party Advisory",
            "VDB Entry",
         ],
         url: "http://packetstormsecurity.com/files/162736/Microsoft-Exchange-ProxyLogon-Collector.html",
      },
      {
         source: "secure@microsoft.com",
         tags: [
            "Patch",
            "Vendor Advisory",
         ],
         url: "https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-26855",
      },
      {
         source: "af854a3a-2127-422b-91ae-364da2661108",
         tags: [
            "Exploit",
            "Third Party Advisory",
            "VDB Entry",
         ],
         url: "http://packetstormsecurity.com/files/161846/Microsoft-Exchange-2019-SSRF-Arbitrary-File-Write.html",
      },
      {
         source: "af854a3a-2127-422b-91ae-364da2661108",
         tags: [
            "Exploit",
            "Third Party Advisory",
            "VDB Entry",
         ],
         url: "http://packetstormsecurity.com/files/161938/Microsoft-Exchange-ProxyLogon-Remote-Code-Execution.html",
      },
      {
         source: "af854a3a-2127-422b-91ae-364da2661108",
         tags: [
            "Exploit",
            "Third Party Advisory",
            "VDB Entry",
         ],
         url: "http://packetstormsecurity.com/files/162610/Microsoft-Exchange-2019-Unauthenticated-Email-Download.html",
      },
      {
         source: "af854a3a-2127-422b-91ae-364da2661108",
         tags: [
            "Exploit",
            "Third Party Advisory",
            "VDB Entry",
         ],
         url: "http://packetstormsecurity.com/files/162736/Microsoft-Exchange-ProxyLogon-Collector.html",
      },
      {
         source: "af854a3a-2127-422b-91ae-364da2661108",
         tags: [
            "Patch",
            "Vendor Advisory",
         ],
         url: "https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-26855",
      },
   ],
   sourceIdentifier: "secure@microsoft.com",
   vulnStatus: "Analyzed",
   weaknesses: [
      {
         description: [
            {
               lang: "en",
               value: "CWE-918",
            },
         ],
         source: "nvd@nist.gov",
         type: "Primary",
      },
      {
         description: [
            {
               lang: "en",
               value: "CWE-918",
            },
         ],
         source: "134c704f-9b21-4f2e-91b3-4a467353bcc0",
         type: "Secondary",
      },
   ],
}


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