CVE-2026-50526 (GCVE-0-2026-50526)

Vulnerability from cvelistv5 – Published: 2026-07-14 19:29 – Updated: 2026-08-03 22:56
VLAI
Title
.NET Tampering Vulnerability
Summary
Improper link resolution before file access ('link following') in .NET allows an authorized attacker to perform tampering locally.
Severity
7 (High)
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
  • CWE-59 - Improper Link Resolution Before File Access ('Link Following')
  • CWE-345 - Insufficient Verification of Data Authenticity
Assigner
References
Impacted products
Date Public
2026-07-14 14:00
Show details on NVD website
To clipboard 

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-50526",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-07-15T03:59:34.142603Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-07-15T10:37:24.524Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": ".NET 10.0",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.10",
              "status": "affected",
              "version": "10.0.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "product": ".NET 8.0",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "8.0.29",
              "status": "affected",
              "version": "8.0.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "product": ".NET 9.0",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "9.0.18",
              "status": "affected",
              "version": "9.0.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "product": "Microsoft Visual Studio 2022 version 17.12",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "17.12.22",
              "status": "affected",
              "version": "17.12.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "product": "Microsoft Visual Studio 2022 version 17.14",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "17.14.36",
              "status": "affected",
              "version": "17.14.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "product": "Microsoft Visual Studio 2026 version 18.7",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "18.7.4",
              "status": "affected",
              "version": "18.0",
              "versionType": "custom"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:a:microsoft:visual_studio_2022:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "17.12.22",
                  "versionStartIncluding": "17.12.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:a:microsoft:.net:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "9.0.18",
                  "versionStartIncluding": "9.0.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:a:microsoft:.net:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "8.0.29",
                  "versionStartIncluding": "8.0.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:a:microsoft:.net:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.10",
                  "versionStartIncluding": "10.0.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:a:microsoft:visual_studio_2026:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "18.7.4",
                  "versionStartIncluding": "18.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:a:microsoft:visual_studio_2022:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "17.14.36",
                  "versionStartIncluding": "17.14.0",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "datePublic": "2026-07-14T14:00:00.000Z",
      "descriptions": [
        {
          "lang": "en-US",
          "value": "Improper link resolution before file access (\u0027link following\u0027) in .NET allows an authorized attacker to perform tampering locally."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C",
            "version": "3.1"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en-US",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-59",
              "description": "CWE-59: Improper Link Resolution Before File Access (\u0027Link Following\u0027)",
              "lang": "en-US",
              "type": "CWE"
            },
            {
              "cweId": "CWE-345",
              "description": "CWE-345: Insufficient Verification of Data Authenticity",
              "lang": "en-US",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-03T22:56:23.587Z",
        "orgId": "f38d906d-7342-40ea-92c1-6c4a2c6478c8",
        "shortName": "microsoft"
      },
      "references": [
        {
          "name": ".NET Tampering Vulnerability",
          "tags": [
            "vendor-advisory",
            "patch"
          ],
          "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-50526"
        }
      ],
      "title": ".NET Tampering Vulnerability"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "f38d906d-7342-40ea-92c1-6c4a2c6478c8",
    "assignerShortName": "microsoft",
    "cveId": "CVE-2026-50526",
    "datePublished": "2026-07-14T19:29:54.992Z",
    "dateReserved": "2026-06-04T19:00:41.293Z",
    "dateUpdated": "2026-08-03T22:56:23.587Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-50526",
      "date": "2026-08-04",
      "epss": "0.00236",
      "percentile": "0.14736"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-50526\",\"sourceIdentifier\":\"secure@microsoft.com\",\"published\":\"2026-07-14T20:17:37.240\",\"lastModified\":\"2026-07-22T21:17:40.993\",\"vulnStatus\":\"Analyzed\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"Improper link resolution before file access (\u0027link following\u0027) in .NET allows an authorized attacker to perform tampering locally.\"}],\"affected\":[{\"source\":\"secure@microsoft.com\",\"affectedData\":[{\"vendor\":\"Microsoft\",\"product\":\".NET 10.0\",\"versions\":[{\"version\":\"10.0.0\",\"lessThan\":\"10.0.10\",\"versionType\":\"custom\",\"status\":\"affected\"}]},{\"vendor\":\"Microsoft\",\"product\":\".NET 8.0\",\"versions\":[{\"version\":\"8.0.0\",\"lessThan\":\"8.0.29\",\"versionType\":\"custom\",\"status\":\"affected\"}]},{\"vendor\":\"Microsoft\",\"product\":\".NET 9.0\",\"versions\":[{\"version\":\"9.0.0\",\"lessThan\":\"9.0.18\",\"versionType\":\"custom\",\"status\":\"affected\"}]},{\"vendor\":\"Microsoft\",\"product\":\"Microsoft Visual Studio 2022 version 17.12\",\"versions\":[{\"version\":\"17.12.0\",\"lessThan\":\"17.12.22\",\"versionType\":\"custom\",\"status\":\"affected\"}]},{\"vendor\":\"Microsoft\",\"product\":\"Microsoft Visual Studio 2022 version 17.14\",\"versions\":[{\"version\":\"17.14.0\",\"lessThan\":\"17.14.36\",\"versionType\":\"custom\",\"status\":\"affected\"}]},{\"vendor\":\"Microsoft\",\"product\":\"Microsoft Visual Studio 2026 version 18.7\",\"versions\":[{\"version\":\"18.0\",\"lessThan\":\"18.7.4\",\"versionType\":\"custom\",\"status\":\"affected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"secure@microsoft.com\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H\",\"baseScore\":7.0,\"baseSeverity\":\"HIGH\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"HIGH\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.0,\"impactScore\":5.9},{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N\",\"baseScore\":5.5,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"NONE\"},\"exploitabilityScore\":1.8,\"impactScore\":3.6}],\"ssvcV203\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"ssvcData\":{\"timestamp\":\"2026-07-15T03:59:34.142603Z\",\"id\":\"CVE-2026-50526\",\"options\":[{\"exploitation\":\"none\"},{\"automatable\":\"no\"},{\"technicalImpact\":\"total\"}],\"role\":\"CISA Coordinator\",\"version\":\"2.0.3\"}}]},\"weaknesses\":[{\"source\":\"secure@microsoft.com\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-59\"},{\"lang\":\"en\",\"value\":\"CWE-345\"}]}],\"configurations\":[{\"operator\":\"AND\",\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:microsoft:.net:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"8.0.0\",\"versionEndExcluding\":\"8.0.29\",\"matchCriteriaId\":\"1144FF26-EDCE-4609-A3E8-56DD190B0953\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:microsoft:.net:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"9.0.0\",\"versionEndExcluding\":\"9.0.18\",\"matchCriteriaId\":\"140E7E20-8E57-462D-B4B5-8A26B4A23925\"}]},{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":false,\"criteria\":\"cpe:2.3:o:apple:macos:-:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"387021A0-AF36-463C-A605-32EA7DAC172E\"},{\"vulnerable\":false,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"703AF700-7A70-47E2-BC3A-7FD03B3CA9C1\"},{\"vulnerable\":false,\"criteria\":\"cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"A2572D17-1DE6-457B-99CC-64AFD54487EA\"}]}]},{\"operator\":\"AND\",\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:microsoft:.net:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"10.0.0\",\"versionEndExcluding\":\"10.0.6\",\"matchCriteriaId\":\"CD89D801-933E-4D78-9187-D2CA94370FA0\"}]},{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":false,\"criteria\":\"cpe:2.3:o:apple:macos:-:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"387021A0-AF36-463C-A605-32EA7DAC172E\"},{\"vulnerable\":false,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"703AF700-7A70-47E2-BC3A-7FD03B3CA9C1\"}]}]},{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:microsoft:visual_studio_2022:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"17.12.0\",\"versionEndExcluding\":\"17.12.22\",\"matchCriteriaId\":\"198B86D0-5A5A-49AF-8095-FB2E481E9440\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:microsoft:visual_studio_2022:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"17.14.0\",\"versionEndExcluding\":\"17.14.36\",\"matchCriteriaId\":\"03F88475-3382-48DF-B2C7-7DCDA8A0EBE7\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:microsoft:visual_studio_2026:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"18.7.0\",\"versionEndExcluding\":\"18.7.4\",\"matchCriteriaId\":\"B3FFA460-81F9-43AF-BA00-49AA2D4F0C51\"}]}]}],\"references\":[{\"url\":\"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-50526\",\"source\":\"secure@microsoft.com\",\"tags\":[\"Patch\",\"Vendor Advisory\"]}]}}",
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-07-23T02:41:55+00:00",
      "cve": "CVE-2026-50526",
      "id": "CVE-2026-50526",
      "initial_release_date": "2026-07-14T19:29:54.992000+00:00",
      "product_status:fixed": "946",
      "product_status:known_not_affected": "1",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "dotnet: .NET: Local tampering via improper link resolution",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-50526.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "important",
      "current_release_date": "2026-07-26T23:31:47Z",
      "cve": "CVE-2026-50526",
      "id": "CVE-2026-50526",
      "initial_release_date": "2026-07-22T16:26:47Z",
      "product_status:recommended": "121",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-50526",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-50526.json",
      "version": "5"
    },
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2026-50526\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"total\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-07-15T03:59:34.142603Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-07-15T10:37:19.402Z\"}}], \"cna\": {\"title\": \".NET Tampering Vulnerability\", \"metrics\": [{\"format\": \"CVSS\", \"cvssV3_1\": {\"version\": \"3.1\", \"baseScore\": 7, \"baseSeverity\": \"HIGH\", \"vectorString\": \"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C\"}, \"scenarios\": [{\"lang\": \"en-US\", \"value\": \"GENERAL\"}]}], \"affected\": [{\"vendor\": \"Microsoft\", \"product\": \".NET 10.0\", \"versions\": [{\"status\": \"affected\", \"version\": \"10.0.0\", \"lessThan\": \"10.0.10\", \"versionType\": \"custom\"}]}, {\"vendor\": \"Microsoft\", \"product\": \".NET 8.0\", \"versions\": [{\"status\": \"affected\", \"version\": \"8.0.0\", \"lessThan\": \"8.0.29\", \"versionType\": \"custom\"}]}, {\"vendor\": \"Microsoft\", \"product\": \".NET 9.0\", \"versions\": [{\"status\": \"affected\", \"version\": \"9.0.0\", \"lessThan\": \"9.0.18\", \"versionType\": \"custom\"}]}, {\"vendor\": \"Microsoft\", \"product\": \"Microsoft Visual Studio 2022 version 17.12\", \"versions\": [{\"status\": \"affected\", \"version\": \"17.12.0\", \"lessThan\": \"17.12.22\", \"versionType\": \"custom\"}]}, {\"vendor\": \"Microsoft\", \"product\": \"Microsoft Visual Studio 2022 version 17.14\", \"versions\": [{\"status\": \"affected\", \"version\": \"17.14.0\", \"lessThan\": \"17.14.36\", \"versionType\": \"custom\"}]}, {\"vendor\": \"Microsoft\", \"product\": \"Microsoft Visual Studio 2026 version 18.7\", \"versions\": [{\"status\": \"affected\", \"version\": \"18.0\", \"lessThan\": \"18.7.4\", \"versionType\": \"custom\"}]}], \"datePublic\": \"2026-07-14T14:00:00.000Z\", \"references\": [{\"url\": \"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-50526\", \"name\": \".NET Tampering Vulnerability\", \"tags\": [\"vendor-advisory\", \"patch\"]}], \"descriptions\": [{\"lang\": \"en-US\", \"value\": \"Improper link resolution before file access (\u0027link following\u0027) in .NET allows an authorized attacker to perform tampering locally.\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en-US\", \"type\": \"CWE\", \"cweId\": \"CWE-59\", \"description\": \"CWE-59: Improper Link Resolution Before File Access (\u0027Link Following\u0027)\"}, {\"lang\": \"en-US\", \"type\": \"CWE\", \"cweId\": \"CWE-345\", \"description\": \"CWE-345: Insufficient Verification of Data Authenticity\"}]}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:a:microsoft:visual_studio_2022:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"17.12.22\", \"versionStartIncluding\": \"17.12.0\"}, {\"criteria\": \"cpe:2.3:a:microsoft:.net:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"9.0.18\", \"versionStartIncluding\": \"9.0.0\"}, {\"criteria\": \"cpe:2.3:a:microsoft:.net:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"8.0.29\", \"versionStartIncluding\": \"8.0.0\"}, {\"criteria\": \"cpe:2.3:a:microsoft:.net:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"10.0.10\", \"versionStartIncluding\": \"10.0.0\"}, {\"criteria\": \"cpe:2.3:a:microsoft:visual_studio_2026:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"18.7.4\", \"versionStartIncluding\": \"18.0\"}, {\"criteria\": \"cpe:2.3:a:microsoft:visual_studio_2022:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"17.14.36\", \"versionStartIncluding\": \"17.14.0\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"f38d906d-7342-40ea-92c1-6c4a2c6478c8\", \"shortName\": \"microsoft\", \"dateUpdated\": \"2026-08-03T22:56:23.587Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2026-50526\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-08-03T22:56:23.587Z\", \"dateReserved\": \"2026-06-04T19:00:41.293Z\", \"assignerOrgId\": \"f38d906d-7342-40ea-92c1-6c4a2c6478c8\", \"datePublished\": \"2026-07-14T19:29:54.992Z\", \"assignerShortName\": \"microsoft\"}",
      "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.