CVE-2021-34485 (GCVE-0-2021-34485)

Vulnerability from cvelistv5 – Published: 2021-08-12 18:11 – Updated: 2026-10-07 16:10
VLAI
Title
.NET Core and Visual Studio Information Disclosure Vulnerability
Summary
.NET Core and Visual Studio Information Disclosure Vulnerability
Severity
5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C
5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-07 16:08 UTC
CWE
  • Information Disclosure
  • CWE-200 - Exposure of Sensitive Information to an Unauthorized Actor
Assigner
microsoft CNA under the mitre root
CNA scorecard B 82/100 over 3948 records in the last 180 days details
References
Impacted products
Date Public
2021-08-10 14:00
Show details on NVD website
To clipboard 

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-04T00:12:50.369Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-34485"
          }
        ],
        "title": "CVE Program Container"
      },
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "LOCAL",
              "availabilityImpact": "NONE",
              "baseScore": 5,
              "baseSeverity": "MEDIUM",
              "confidentialityImpact": "HIGH",
              "integrityImpact": "NONE",
              "privilegesRequired": "LOW",
              "scope": "UNCHANGED",
              "userInteraction": "REQUIRED",
              "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N",
              "version": "3.1"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2021-34485",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-10-07T16:08:14.030039Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "problemTypes": [
          {
            "descriptions": [
              {
                "cweId": "CWE-200",
                "description": "CWE-200 Exposure of Sensitive Information to an Unauthorized Actor",
                "lang": "en",
                "type": "CWE"
              }
            ]
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-10-07T16:10:01.671Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": ".NET 5.0",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "5.0.9",
              "status": "affected",
              "version": "5.0.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "product": ".NET Core 2.1",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "2.1.30",
              "status": "affected",
              "version": "2.1",
              "versionType": "custom"
            }
          ]
        },
        {
          "product": ".NET Core 3.1",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "3.1.18",
              "status": "affected",
              "version": "3.1",
              "versionType": "custom"
            }
          ]
        },
        {
          "product": "Microsoft Visual Studio 2017 version 15.9 (includes 15.0 - 15.8)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "15.9.38",
              "status": "affected",
              "version": "15.9.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "product": "Microsoft Visual Studio 2019 version 16.10 (includes 16.0 - 16.9)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "16.10.5",
              "status": "affected",
              "version": "16.10.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "product": "Microsoft Visual Studio 2019 version 16.4 (includes 16.0 - 16.3)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "16.4.25",
              "status": "affected",
              "version": "16.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "product": "Microsoft Visual Studio 2019 version 16.7 (includes 16.0 \u2013 16.6)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "16.7.18",
              "status": "affected",
              "version": "16.0.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "product": "Microsoft Visual Studio 2019 version 16.9 (includes 16.0 - 16.8)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "16.9.10",
              "status": "affected",
              "version": "15.0.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "product": "PowerShell 7.0",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "7.0.7",
              "status": "affected",
              "version": "7.0.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "product": "PowerShell 7.1",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "7.1.4",
              "status": "affected",
              "version": "7.1.0",
              "versionType": "custom"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:a:microsoft:visual_studio_2017:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "15.9.38",
                  "versionStartIncluding": "15.9.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:a:microsoft:visual_studio_2019:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "16.4.25",
                  "versionStartIncluding": "16.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:a:microsoft:visual_studio_2019:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "16.7.18",
                  "versionStartIncluding": "16.0.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:a:microsoft:visual_studio_2019:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "16.9.10",
                  "versionStartIncluding": "15.0.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:a:microsoft:visual_studio_2019:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "16.10.5",
                  "versionStartIncluding": "16.10.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:a:microsoft:powershell_core:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.1.4",
                  "versionStartIncluding": "7.1.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:a:microsoft:powershell_core:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.0.7",
                  "versionStartIncluding": "7.0.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:a:microsoft:.net_core:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "2.1.30",
                  "versionStartIncluding": "2.1",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:a:microsoft:.net_core:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "3.1.18",
                  "versionStartIncluding": "3.1",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:a:microsoft:.net:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.0.9",
                  "versionStartIncluding": "5.0.0",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "datePublic": "2021-08-10T14:00:00.000Z",
      "descriptions": [
        {
          "lang": "en-US",
          "value": ".NET Core and Visual Studio Information Disclosure Vulnerability"
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 5,
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C",
            "version": "3.1"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en-US",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "Information Disclosure",
              "lang": "en-US",
              "type": "Impact"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-10T15:10:06.311Z",
        "orgId": "f38d906d-7342-40ea-92c1-6c4a2c6478c8",
        "shortName": "microsoft"
      },
      "references": [
        {
          "name": ".NET Core and Visual Studio Information Disclosure Vulnerability",
          "tags": [
            "vendor-advisory",
            "patch"
          ],
          "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-34485"
        }
      ],
      "title": ".NET Core and Visual Studio Information Disclosure Vulnerability"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "f38d906d-7342-40ea-92c1-6c4a2c6478c8",
    "assignerShortName": "microsoft",
    "cveId": "CVE-2021-34485",
    "datePublished": "2021-08-12T18:11:57.000Z",
    "dateReserved": "2021-06-09T00:00:00.000Z",
    "dateUpdated": "2026-10-07T16:10:01.671Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2021-34485",
      "date": "2026-10-21",
      "epss": "0.02066",
      "percentile": "0.81208"
    },
    "nvd": {
      "cve": {
        "affected": [
          {
            "affectedData": [
              {
                "product": ".NET 5.0",
                "vendor": "Microsoft",
                "versions": [
                  {
                    "lessThan": "5.0.9",
                    "status": "affected",
                    "version": "5.0.0",
                    "versionType": "custom"
                  }
                ]
              },
              {
                "product": ".NET Core 2.1",
                "vendor": "Microsoft",
                "versions": [
                  {
                    "lessThan": "2.1.30",
                    "status": "affected",
                    "version": "2.1",
                    "versionType": "custom"
                  }
                ]
              },
              {
                "product": ".NET Core 3.1",
                "vendor": "Microsoft",
                "versions": [
                  {
                    "lessThan": "3.1.18",
                    "status": "affected",
                    "version": "3.1",
                    "versionType": "custom"
                  }
                ]
              },
              {
                "product": "Microsoft Visual Studio 2017 version 15.9 (includes 15.0 - 15.8)",
                "vendor": "Microsoft",
                "versions": [
                  {
                    "lessThan": "15.9.38",
                    "status": "affected",
                    "version": "15.9.0",
                    "versionType": "custom"
                  }
                ]
              },
              {
                "product": "Microsoft Visual Studio 2019 version 16.10 (includes 16.0 - 16.9)",
                "vendor": "Microsoft",
                "versions": [
                  {
                    "lessThan": "16.10.5",
                    "status": "affected",
                    "version": "16.10.0",
                    "versionType": "custom"
                  }
                ]
              },
              {
                "product": "Microsoft Visual Studio 2019 version 16.4 (includes 16.0 - 16.3)",
                "vendor": "Microsoft",
                "versions": [
                  {
                    "lessThan": "16.4.25",
                    "status": "affected",
                    "version": "16.0",
                    "versionType": "custom"
                  }
                ]
              },
              {
                "product": "Microsoft Visual Studio 2019 version 16.7 (includes 16.0 \u2013 16.6)",
                "vendor": "Microsoft",
                "versions": [
                  {
                    "lessThan": "16.7.18",
                    "status": "affected",
                    "version": "16.0.0",
                    "versionType": "custom"
                  }
                ]
              },
              {
                "product": "Microsoft Visual Studio 2019 version 16.9 (includes 16.0 - 16.8)",
                "vendor": "Microsoft",
                "versions": [
                  {
                    "lessThan": "16.9.10",
                    "status": "affected",
                    "version": "15.0.0",
                    "versionType": "custom"
                  }
                ]
              },
              {
                "product": "PowerShell 7.0",
                "vendor": "Microsoft",
                "versions": [
                  {
                    "lessThan": "7.0.7",
                    "status": "affected",
                    "version": "7.0.0",
                    "versionType": "custom"
                  }
                ]
              },
              {
                "product": "PowerShell 7.1",
                "vendor": "Microsoft",
                "versions": [
                  {
                    "lessThan": "7.1.4",
                    "status": "affected",
                    "version": "7.1.0",
                    "versionType": "custom"
                  }
                ]
              }
            ],
            "source": "secure@microsoft.com"
          }
        ],
        "configurations": [
          {
            "nodes": [
              {
                "cpeMatch": [
                  {
                    "criteria": "cpe:2.3:a:microsoft:.net:*:*:*:*:*:*:*:*",
                    "matchCriteriaId": "B85CD4C7-D84B-4C54-A604-FC852038A565",
                    "versionEndIncluding": "5.0.8",
                    "versionStartIncluding": "5.0",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:a:microsoft:.net_core:*:*:*:*:*:*:*:*",
                    "matchCriteriaId": "FB624437-CB1B-46A2-BF75-30035D99D2EF",
                    "versionEndIncluding": "2.1.28",
                    "versionStartIncluding": "2.1",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:a:microsoft:.net_core:*:*:*:*:*:*:*:*",
                    "matchCriteriaId": "6F344BDC-2929-4CEA-8414-E4D07C1F76F0",
                    "versionEndIncluding": "3.1.17",
                    "versionStartIncluding": "3.1",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:a:microsoft:powershell_core:*:*:*:*:*:*:*:*",
                    "matchCriteriaId": "BE4005F4-89BB-4597-9070-1137B4CEFC9B",
                    "versionEndExcluding": "7.0.7",
                    "versionStartIncluding": "7.0",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:a:microsoft:powershell_core:*:*:*:*:*:*:*:*",
                    "matchCriteriaId": "40F33C0C-7AF0-4B48-828C-00534012D728",
                    "versionEndExcluding": "7.1.4",
                    "versionStartIncluding": "7.1",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:a:microsoft:visual_studio_2017:*:*:*:*:*:*:*:*",
                    "matchCriteriaId": "CE03B37D-72FE-4C25-BE62-9C422AEFC80E",
                    "versionEndIncluding": "15.9",
                    "versionStartIncluding": "15.0",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:a:microsoft:visual_studio_2019:*:*:*:*:*:*:*:*",
                    "matchCriteriaId": "26472C42-CDB4-4176-B10B-3BF26F5030E3",
                    "versionEndIncluding": "16.10",
                    "versionStartIncluding": "16.0",
                    "vulnerable": true
                  }
                ],
                "negate": false,
                "operator": "OR"
              }
            ]
          }
        ],
        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": ".NET Core and Visual Studio Information Disclosure Vulnerability"
          },
          {
            "lang": "es",
            "value": "Una Vulnerabilidad de Divulgaci\u00f3n de Informaci\u00f3n en .NET Core y Visual Studio"
          }
        ],
        "id": "CVE-2021-34485",
        "lastModified": "2026-10-07T17:16:42.997",
        "metrics": {
          "cvssMetricV2": [
            {
              "acInsufInfo": false,
              "baseSeverity": "LOW",
              "cvssData": {
                "accessComplexity": "LOW",
                "accessVector": "LOCAL",
                "authentication": "NONE",
                "availabilityImpact": "NONE",
                "baseScore": 2.1,
                "confidentialityImpact": "PARTIAL",
                "integrityImpact": "NONE",
                "vectorString": "AV:L/AC:L/Au:N/C:P/I:N/A:N",
                "version": "2.0"
              },
              "exploitabilityScore": 3.9,
              "impactScore": 2.9,
              "obtainAllPrivilege": false,
              "obtainOtherPrivilege": false,
              "obtainUserPrivilege": false,
              "source": "nvd@nist.gov",
              "type": "Primary",
              "userInteractionRequired": false
            }
          ],
          "cvssMetricV31": [
            {
              "cvssData": {
                "attackComplexity": "LOW",
                "attackVector": "LOCAL",
                "availabilityImpact": "NONE",
                "baseScore": 5.0,
                "baseSeverity": "MEDIUM",
                "confidentialityImpact": "HIGH",
                "integrityImpact": "NONE",
                "privilegesRequired": "LOW",
                "scope": "UNCHANGED",
                "userInteraction": "REQUIRED",
                "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N",
                "version": "3.1"
              },
              "exploitabilityScore": 1.3,
              "impactScore": 3.6,
              "source": "secure@microsoft.com",
              "type": "Secondary"
            },
            {
              "cvssData": {
                "attackComplexity": "LOW",
                "attackVector": "LOCAL",
                "availabilityImpact": "NONE",
                "baseScore": 5.5,
                "baseSeverity": "MEDIUM",
                "confidentialityImpact": "HIGH",
                "integrityImpact": "NONE",
                "privilegesRequired": "LOW",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N",
                "version": "3.1"
              },
              "exploitabilityScore": 1.8,
              "impactScore": 3.6,
              "source": "nvd@nist.gov",
              "type": "Secondary"
            },
            {
              "cvssData": {
                "attackComplexity": "LOW",
                "attackVector": "LOCAL",
                "availabilityImpact": "NONE",
                "baseScore": 5.0,
                "baseSeverity": "MEDIUM",
                "confidentialityImpact": "HIGH",
                "integrityImpact": "NONE",
                "privilegesRequired": "LOW",
                "scope": "UNCHANGED",
                "userInteraction": "REQUIRED",
                "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N",
                "version": "3.1"
              },
              "exploitabilityScore": 1.3,
              "impactScore": 3.6,
              "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
              "type": "Secondary"
            }
          ],
          "ssvcV203": [
            {
              "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
              "ssvcData": {
                "id": "CVE-2021-34485",
                "options": [
                  {
                    "exploitation": "none"
                  },
                  {
                    "automatable": "no"
                  },
                  {
                    "technicalImpact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-10-07T16:08:14.030039Z",
                "version": "2.0.3"
              }
            }
          ]
        },
        "published": "2021-08-12T18:15:09.157",
        "references": [
          {
            "source": "secure@microsoft.com",
            "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-34485"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Patch",
              "Vendor Advisory"
            ],
            "url": "https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-34485"
          }
        ],
        "sourceIdentifier": "secure@microsoft.com",
        "vulnStatus": "Modified",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "NVD-CWE-noinfo"
              }
            ],
            "source": "nvd@nist.gov",
            "type": "Primary"
          },
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-200"
              }
            ],
            "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
            "type": "Secondary"
          }
        ]
      }
    },
    "redhat_vex": {
      "aggregate_severity": "Low",
      "current_release_date": "2026-10-07T18:29:32+00:00",
      "cve": "CVE-2021-34485",
      "id": "CVE-2021-34485",
      "initial_release_date": "2021-08-10T19:00:00+00:00",
      "product_status:fixed": "152",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "dotnet: Dump file created world-readable",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2021/cve-2021-34485.json",
      "version": "3"
    }
  }
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.

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.
Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

JSON

Loading timeline…




    Related by attack behaviour

    Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.