GCVE Workshop - 22 September 2026 (14:00-18:00), Luxembourg Before The Vulnopticon Conference - Registration

CVE-2021-43613 (GCVE-0-2021-43613)

Vulnerability from cvelistv5 – Published: 2026-09-03 02:05 – Updated: 2026-09-03 13:03
VLAI
Title
SysPasswordDxe: Password hashes are exposed in runtime UEFI variables, leading to escalation of privilege
Summary
An issue was discovered in SysPasswordDxe in Insyde InsydeH2O. User and administrator password hashes are exposed in runtime UEFI variables, leading to escalation of privilege
Severity
6.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:N
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-03 13:02 UTC
CWE
  • CWE-732 - Incorrect Permission Assignment for Critical Resource
Assigner
References
Impacted products
Vendor Product Version CPE status
Insyde Software InsydeH2O Affected: See in the Solution
guessed Create a notification for this product.
Date Public
2026-09-03 01:55
Show details on NVD website
To clipboard 

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2021-43613",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-09-03T13:02:56.308572Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-09-03T13:03:26.609Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "platforms": [
            "x86"
          ],
          "product": "InsydeH2O",
          "vendor": "Insyde Software",
          "versions": [
            {
              "status": "affected",
              "version": "See in the Solution"
            }
          ]
        }
      ],
      "datePublic": "2026-09-03T01:55:00.000Z",
      "descriptions": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "An issue was discovered in SysPasswordDxe in Insyde InsydeH2O. User and administrator password hashes are exposed in runtime UEFI variables, leading to escalation of privilege"
            }
          ],
          "value": "An issue was discovered in SysPasswordDxe in Insyde InsydeH2O. User and administrator password hashes are exposed in runtime UEFI variables, leading to escalation of privilege"
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "LOCAL",
            "availabilityImpact": "NONE",
            "baseScore": 6.5,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "HIGH",
            "privilegesRequired": "LOW",
            "scope": "CHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:N",
            "version": "3.1"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-732",
              "description": "CWE-732: Incorrect Permission Assignment for Critical Resource",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-03T02:05:35.544Z",
        "orgId": "8338d8cb-57f7-4252-abc0-96fd13e98d21",
        "shortName": "Insyde"
      },
      "references": [
        {
          "url": "https://www.insyde.com/security-pledge/sa-2022027/"
        }
      ],
      "solutions": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "\u003cp\u003eKernel\n5.1: Version 05.17.09\u003c/p\u003e\n\n\u003cp\u003eKernel 5.2:\nVersion 05.27.09\u003c/p\u003e\n\n\u003cp\u003eKernel 5.3:\nVersion 05.36.09\u003c/p\u003e\n\n\u003cp\u003eKernel 5.4:\nVersion 05.44.09\u003c/p\u003e\n\n\u003cp\u003eKernel 5.5:\nVersion 05.52.09\u003c/p\u003e"
            }
          ],
          "value": "Kernel\n5.1: Version 05.17.09\n\n\n\n\n\nKernel 5.2:\nVersion 05.27.09\n\n\n\n\n\nKernel 5.3:\nVersion 05.36.09\n\n\n\n\n\nKernel 5.4:\nVersion 05.44.09\n\n\n\n\n\nKernel 5.5:\nVersion 05.52.09"
        }
      ],
      "source": {
        "discovery": "UNKNOWN"
      },
      "title": "SysPasswordDxe: Password hashes are exposed in runtime UEFI variables, leading to escalation of privilege",
      "x_generator": {
        "engine": "Vulnogram 1.0.5"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "8338d8cb-57f7-4252-abc0-96fd13e98d21",
    "assignerShortName": "Insyde",
    "cveId": "CVE-2021-43613",
    "datePublished": "2026-09-03T02:05:35.544Z",
    "dateReserved": "2021-11-12T22:48:20.355Z",
    "dateUpdated": "2026-09-03T13:03:26.609Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2021-43613",
      "date": "2026-09-06",
      "epss": "0.00114",
      "percentile": "0.01606"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2021-43613\",\"sourceIdentifier\":\"8338d8cb-57f7-4252-abc0-96fd13e98d21\",\"published\":\"2026-09-03T13:04:12.157\",\"lastModified\":\"2026-09-03T18:09:03.317\",\"vulnStatus\":\"Undergoing Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"An issue was discovered in SysPasswordDxe in Insyde InsydeH2O. User and administrator password hashes are exposed in runtime UEFI variables, leading to escalation of privilege\"}],\"affected\":[{\"source\":\"8338d8cb-57f7-4252-abc0-96fd13e98d21\",\"affectedData\":[{\"vendor\":\"Insyde Software\",\"product\":\"InsydeH2O\",\"defaultStatus\":\"unaffected\",\"platforms\":[\"x86\"],\"versions\":[{\"version\":\"See in the Solution\",\"status\":\"affected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"8338d8cb-57f7-4252-abc0-96fd13e98d21\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:N\",\"baseScore\":6.5,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"CHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"NONE\"},\"exploitabilityScore\":2.0,\"impactScore\":4.0}],\"ssvcV203\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"ssvcData\":{\"timestamp\":\"2026-09-03T13:02:56.308572Z\",\"id\":\"CVE-2021-43613\",\"options\":[{\"exploitation\":\"none\"},{\"automatable\":\"no\"},{\"technicalImpact\":\"partial\"}],\"role\":\"CISA Coordinator\",\"version\":\"2.0.3\"}}]},\"weaknesses\":[{\"source\":\"8338d8cb-57f7-4252-abc0-96fd13e98d21\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-732\"}]}],\"references\":[{\"url\":\"https://www.insyde.com/security-pledge/sa-2022027/\",\"source\":\"8338d8cb-57f7-4252-abc0-96fd13e98d21\"}]}}",
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2021-43613\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-09-03T13:02:56.308572Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-09-03T13:02:59.828Z\"}}], \"cna\": {\"title\": \"SysPasswordDxe: Password hashes are exposed in runtime UEFI variables, leading to escalation of privilege\", \"source\": {\"discovery\": \"UNKNOWN\"}, \"metrics\": [{\"format\": \"CVSS\", \"cvssV3_1\": {\"scope\": \"CHANGED\", \"version\": \"3.1\", \"baseScore\": 6.5, \"attackVector\": \"LOCAL\", \"baseSeverity\": \"MEDIUM\", \"vectorString\": \"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:N\", \"integrityImpact\": \"HIGH\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"availabilityImpact\": \"NONE\", \"privilegesRequired\": \"LOW\", \"confidentialityImpact\": \"NONE\"}, \"scenarios\": [{\"lang\": \"en\", \"value\": \"GENERAL\"}]}], \"affected\": [{\"vendor\": \"Insyde Software\", \"product\": \"InsydeH2O\", \"versions\": [{\"status\": \"affected\", \"version\": \"See in the Solution\"}], \"platforms\": [\"x86\"], \"defaultStatus\": \"unaffected\"}], \"solutions\": [{\"lang\": \"en\", \"value\": \"Kernel\\n5.1: Version 05.17.09\\n\\n\\n\\n\\n\\nKernel 5.2:\\nVersion 05.27.09\\n\\n\\n\\n\\n\\nKernel 5.3:\\nVersion 05.36.09\\n\\n\\n\\n\\n\\nKernel 5.4:\\nVersion 05.44.09\\n\\n\\n\\n\\n\\nKernel 5.5:\\nVersion 05.52.09\", \"supportingMedia\": [{\"type\": \"text/html\", \"value\": \"\u003cp\u003eKernel\\n5.1: Version 05.17.09\u003c/p\u003e\\n\\n\u003cp\u003eKernel 5.2:\\nVersion 05.27.09\u003c/p\u003e\\n\\n\u003cp\u003eKernel 5.3:\\nVersion 05.36.09\u003c/p\u003e\\n\\n\u003cp\u003eKernel 5.4:\\nVersion 05.44.09\u003c/p\u003e\\n\\n\u003cp\u003eKernel 5.5:\\nVersion 05.52.09\u003c/p\u003e\", \"base64\": false}]}], \"datePublic\": \"2026-09-03T01:55:00.000Z\", \"references\": [{\"url\": \"https://www.insyde.com/security-pledge/sa-2022027/\"}], \"x_generator\": {\"engine\": \"Vulnogram 1.0.5\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"An issue was discovered in SysPasswordDxe in Insyde InsydeH2O. User and administrator password hashes are exposed in runtime UEFI variables, leading to escalation of privilege\", \"supportingMedia\": [{\"type\": \"text/html\", \"value\": \"An issue was discovered in SysPasswordDxe in Insyde InsydeH2O. User and administrator password hashes are exposed in runtime UEFI variables, leading to escalation of privilege\", \"base64\": false}]}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-732\", \"description\": \"CWE-732: Incorrect Permission Assignment for Critical Resource\"}]}], \"providerMetadata\": {\"orgId\": \"8338d8cb-57f7-4252-abc0-96fd13e98d21\", \"shortName\": \"Insyde\", \"dateUpdated\": \"2026-09-03T02:05:35.544Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2021-43613\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-09-03T13:03:26.609Z\", \"dateReserved\": \"2021-11-12T22:48:20.355Z\", \"assignerOrgId\": \"8338d8cb-57f7-4252-abc0-96fd13e98d21\", \"datePublished\": \"2026-09-03T02:05:35.544Z\", \"assignerShortName\": \"Insyde\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.





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

Author Source Type Date Other

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.


Detection rules are retrieved from Rulezet.