{"id":"CVE-2021-21985","state":"PUBLISHED","title":"The vSphere Client (HTML5) contains a remote code execution vulnerability due to lack of input validation in the Virtual SAN Health Check plug-in which is enabled by default in vCe","description":"The vSphere Client (HTML5) contains a remote code execution vulnerability due to lack of input validation in the Virtual SAN Health Check plug-in which is enabled by default in vCenter Server. A malicious actor with network access to port 443 may exploit this issue to execute commands with unrestricted privileges on the underlying operating system that hosts vCenter Server.","publishedAt":"2021-05-26T14:04:30.000Z","updatedAt":"2026-08-12T03:55:45.773Z","severity":{"score":9.8,"label":"Critical","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","source":"CISA-ADP"},"assigner":"vmware","products":["n/a VMware vCenter Server and VMware Cloud Foundation"],"affected":[{"vendor":"n/a","product":"VMware vCenter Server and VMware Cloud Foundation","versions":[{"version":"VMware vCenter Server (7.x before 7.0 U2b, 6.7 before 6.7 U3n, 6.5 before 6.5 U3p) and VMware Cloud Foundation (4.x before 4.2.1, 3.x before 3.10.2.1)","status":"affected"}]}],"references":["https://www.vmware.com/security/advisories/VMSA-2021-0010.html","http://packetstormsecurity.com/files/162812/VMware-Security-Advisory-2021-0010.html","http://packetstormsecurity.com/files/163487/VMware-vCenter-Server-Virtual-SAN-Health-Check-Remote-Code-Execution.html","https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-21985"],"weaknesses":["CWE-20","CWE-470","CWE-918"],"ingestedAt":"2026-10-29T19:47:59.168Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2021/21xxx/CVE-2021-21985.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2021-21985","state":"PUBLISHED","datePublished":"2021-05-26T14:04:30.000Z","dateUpdated":"2026-08-12T03:55:45.773Z","assignerShortName":"vmware","assignerOrgId":"dcf2e128-44bd-42ed-91e8-88f912c1401d","dateReserved":"2021-01-04T00:00:00.000Z"},"containers":{"cna":{"descriptions":[{"lang":"en","value":"The vSphere Client (HTML5) contains a remote code execution vulnerability due to lack of input validation in the Virtual SAN Health Check plug-in which is enabled by default in vCenter Server. A malicious actor with network access to port 443 may exploit this issue to execute commands with unrestricted privileges on the underlying operating system that hosts vCenter Server."}],"affected":[{"vendor":"n/a","product":"VMware vCenter Server and VMware Cloud Foundation","versions":[{"version":"VMware vCenter Server (7.x before 7.0 U2b, 6.7 before 6.7 U3n, 6.5 before 6.5 U3p) and VMware Cloud Foundation (4.x before 4.2.1, 3.x before 3.10.2.1)","status":"affected"}]}],"references":[{"url":"https://www.vmware.com/security/advisories/VMSA-2021-0010.html","tags":["x_refsource_MISC"]},{"url":"http://packetstormsecurity.com/files/162812/VMware-Security-Advisory-2021-0010.html","tags":["x_refsource_MISC"]},{"url":"http://packetstormsecurity.com/files/163487/VMware-vCenter-Server-Virtual-SAN-Health-Check-Remote-Code-Execution.html","tags":["x_refsource_MISC"]}],"problemTypes":[{"descriptions":[{"description":"Remote code execution vulnerability","lang":"en","type":"text"}]}],"providerMetadata":{"shortName":"vmware","dateUpdated":"2021-07-13T16:06:26.000Z","orgId":"dcf2e128-44bd-42ed-91e8-88f912c1401d"},"x_legacyV4Record":{"CVE_data_meta":{"ASSIGNER":"security@vmware.com","ID":"CVE-2021-21985","STATE":"PUBLIC"},"affects":{"vendor":{"vendor_data":[{"product":{"product_data":[{"product_name":"VMware vCenter Server and VMware Cloud Foundation","version":{"version_data":[{"version_value":"VMware vCenter Server (7.x before 7.0 U2b, 6.7 before 6.7 U3n, 6.5 before 6.5 U3p) and VMware Cloud Foundation (4.x before 4.2.1, 3.x before 3.10.2.1)"}]}}]},"vendor_name":"n/a"}]}},"data_format":"MITRE","data_type":"CVE","data_version":"4.0","description":{"description_data":[{"lang":"eng","value":"The vSphere Client (HTML5) contains a remote code execution vulnerability due to lack of input validation in the Virtual SAN Health Check plug-in which is enabled by default in vCenter Server. A malicious actor with network access to port 443 may exploit this issue to execute commands with unrestricted privileges on the underlying operating system that hosts vCenter Server."}]},"problemtype":{"problemtype_data":[{"description":[{"lang":"eng","value":"Remote code execution vulnerability"}]}]},"references":{"reference_data":[{"name":"https://www.vmware.com/security/advisories/VMSA-2021-0010.html","refsource":"MISC","url":"https://www.vmware.com/security/advisories/VMSA-2021-0010.html"},{"name":"http://packetstormsecurity.com/files/162812/VMware-Security-Advisory-2021-0010.html","refsource":"MISC","url":"http://packetstormsecurity.com/files/162812/VMware-Security-Advisory-2021-0010.html"},{"name":"http://packetstormsecurity.com/files/163487/VMware-vCenter-Server-Virtual-SAN-Health-Check-Remote-Code-Execution.html","refsource":"MISC","url":"http://packetstormsecurity.com/files/163487/VMware-vCenter-Server-Virtual-SAN-Health-Check-Remote-Code-Execution.html"}]}}},"adp":[{"title":"CVE Program Container","references":[{"url":"https://www.vmware.com/security/advisories/VMSA-2021-0010.html","tags":["x_refsource_MISC","x_transferred"]},{"url":"http://packetstormsecurity.com/files/162812/VMware-Security-Advisory-2021-0010.html","tags":["x_refsource_MISC","x_transferred"]},{"url":"http://packetstormsecurity.com/files/163487/VMware-vCenter-Server-Virtual-SAN-Health-Check-Remote-Code-Execution.html","tags":["x_refsource_MISC","x_transferred"]}],"providerMetadata":{"shortName":"CVE","orgId":"af854a3a-2127-422b-91ae-364da2661108","dateUpdated":"2024-08-03T18:30:23.663Z"}},{"title":"CISA ADP Vulnrichment","references":[{"url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-21985","tags":["government-resource"]}],"metrics":[{"cvssV3_1":{"scope":"UNCHANGED","version":"3.1","baseScore":9.8,"attackVector":"NETWORK","baseSeverity":"CRITICAL","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","integrityImpact":"HIGH","userInteraction":"NONE","attackComplexity":"LOW","availabilityImpact":"HIGH","privilegesRequired":"NONE","confidentialityImpact":"HIGH"}},{"other":{"type":"ssvc","content":{"timestamp":"2021-05-26T00:00:00+00:00","options":[{"Exploitation":"active"},{"Automatable":"yes"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3","id":"CVE-2021-21985"}}},{"other":{"type":"kev","content":{"dateAdded":"2021-11-03","reference":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-21985"}}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-20","lang":"en","type":"CWE","description":"CWE-20 Improper Input Validation"}]},{"descriptions":[{"cweId":"CWE-470","lang":"en","type":"CWE","description":"CWE-470 Use of Externally-Controlled Input to Select Classes or Code ('Unsafe Reflection')"}]},{"descriptions":[{"cweId":"CWE-918","lang":"en","type":"CWE","description":"CWE-918 Server-Side Request Forgery (SSRF)"}]}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-08-12T03:55:45.773Z"},"timeline":[{"time":"2021-11-03T00:00:00.000Z","lang":"en","value":"CVE-2021-21985 added to CISA KEV"}]}]}}}