Vulnerability-Lookup

FKIE_CVE-2026-69522

Vulnerability from fkie_nvd - Published: 2026-09-08 18:19 - Updated: 2026-09-09 04:18

Severity

8.8 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Summary

Heap-based buffer overflow in Visual Studio allows an unauthorized attacker to execute code over a network.

References

	URL	Tags
	secure@microsoft.com	https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69522

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "product": ".NET 10.0",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.12",
              "status": "affected",
              "version": "10.0.0",
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          ]
        },
        {
          "product": ".NET 11.0",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "11.0 RC1",
              "status": "affected",
              "version": "11.0.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "product": ".NET 8.0",
          "vendor": "Microsoft",
          "versions": [
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              "status": "affected",
              "version": "8.0.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "product": ".NET 9.0",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "9.0.20",
              "status": "affected",
              "version": "9.0.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "Windows 10 Version 1607 for 32-bit Systems",
            "Windows 10 Version 1607 for x64-based Systems",
            "Windows Server 2016",
            "Windows Server 2019"
          ],
          "product": "Microsoft .NET Framework 3.5 AND 4.6.2/4.7/4.7.1/4.7.2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "2.0.50727.8984 \u0026 3.0.30729.8980 \u0026 4.7.4145.0",
              "status": "affected",
              "version": "3.0.0.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "Windows 10 Version 1809 for 32-bit Systems",
            "Windows 10 Version 1809 for ARM64-based Systems",
            "Windows 10 Version 1809 for x64-based Systems"
          ],
          "product": "Microsoft .NET Framework 3.5 AND 4.7.2",
          "vendor": "Microsoft",
          "versions": [
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              "status": "affected",
              "version": "4.7.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
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            "Windows 10 Version 1809 for ARM64-based Systems",
            "Windows 10 Version 1809 for x64-based Systems",
            "Windows 10 Version 21H2 for 32-bit Systems",
            "Windows 10 Version 21H2 for ARM64-based Systems",
            "Windows 10 Version 21H2 for x64-based Systems",
            "Windows 10 Version 22H2 for 32-bit Systems",
            "Windows 10 Version 22H2 for ARM64-based Systems",
            "Windows 10 Version 22H2 for x64-based Systems",
            "Windows Server 2019",
            "Windows Server 2022"
          ],
          "product": "Microsoft .NET Framework 3.5 AND 4.8",
          "vendor": "Microsoft",
          "versions": [
            {
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              "status": "affected",
              "version": "4.8.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "Windows 10 Version 21H2 for 32-bit Systems",
            "Windows 10 Version 21H2 for ARM64-based Systems",
            "Windows 10 Version 21H2 for x64-based Systems",
            "Windows 10 Version 22H2 for 32-bit Systems",
            "Windows 10 Version 22H2 for ARM64-based Systems",
            "Windows 10 Version 22H2 for x64-based Systems",
            "Windows 11 Version 23H2 for ARM64-based Systems",
            "Windows 11 Version 23H2 for x64-based Systems",
            "Windows 11 Version 24H2 for ARM64-based Systems",
            "Windows 11 Version 24H2 for x64-based Systems",
            "Windows 11 Version 25H2 for ARM64-based Systems",
            "Windows 11 Version 25H2 for x64-based Systems",
            "Windows Server 2022",
            "Windows Server 2025"
          ],
          "product": "Microsoft .NET Framework 3.5 AND 4.8.1",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "2.0.50727.9183 \u0026 3.0.30729.9169 \u0026 4.8.9347.0",
              "status": "affected",
              "version": "4.8.1",
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            }
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        },
        {
          "platforms": [
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            "Windows Server 2012 R2"
          ],
          "product": "Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2",
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          "versions": [
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          ]
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          "platforms": [
            "Windows 10 Version 1607 for 32-bit Systems",
            "Windows 10 Version 1607 for x64-based Systems",
            "Windows Server 2012",
            "Windows Server 2012 R2",
            "Windows Server 2016"
          ],
          "product": "Microsoft .NET Framework 4.8",
          "vendor": "Microsoft",
          "versions": [
            {
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              "status": "affected",
              "version": "4.8.0",
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        {
          "platforms": [
            "Windows 11 Version 26H1 for ARM64-based Systems",
            "Windows 11 version 26H1 for x64-based Systems"
          ],
          "product": "Microsoft .NET Framework 4.8.1",
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          "versions": [
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              "status": "affected",
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          ]
        },
        {
          "product": "Microsoft Visual Studio 2022 version 17.14",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "17.14.40",
              "status": "affected",
              "version": "17.14.0",
              "versionType": "custom"
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          ]
        },
        {
          "product": "Microsoft Visual Studio 2026 version 18.9",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "18.9.3",
              "status": "affected",
              "version": "18.9.0",
              "versionType": "custom"
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    }
  ],
  "cveTags": [],
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      "value": "Heap-based buffer overflow in Visual Studio allows an unauthorized attacker to execute code over a network."
    }
  ],
  "id": "CVE-2026-69522",
  "lastModified": "2026-09-09T04:18:56.650",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 8.8,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "REQUIRED",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
          "version": "3.1"
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        "exploitabilityScore": 2.8,
        "impactScore": 5.9,
        "source": "secure@microsoft.com",
        "type": "Secondary"
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        "ssvcData": {
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          "options": [
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          "timestamp": "2026-09-03T00:00:00+00:00",
          "version": "2.0.3"
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  },
  "published": "2026-09-08T18:19:19.697",
  "references": [
    {
      "source": "secure@microsoft.com",
      "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69522"
    }
  ],
  "sourceIdentifier": "secure@microsoft.com",
  "vulnStatus": "Undergoing Analysis",
  "weaknesses": [
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      "description": [
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          "value": "CWE-122"
        }
      ],
      "source": "secure@microsoft.com",
      "type": "Secondary"
    }
  ]
}

CVE-2026-69522 (GCVE-0-2026-69522)

Vulnerability from cvelistv5 – Published: 2026-09-08 17:10 – Updated: 2026-09-10 23:03

Title

.NET and Visual Studio Remote Code Execution Vulnerability

Summary

Heap-based buffer overflow in Visual Studio allows an unauthorized attacker to execute code over a network.

Severity

8.8 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-03 00:00 UTC

CWE

CWE-122 - Heap-based Buffer Overflow

Assigner

microsoft mitre root

References

1 reference

URL	Tags
https://msrc.microsoft.com/update-guide/vulnerabi…	vendor-advisorypatch

Impacted products

13 products

Vendor	Product	Version
Microsoft	.NET 10.0	Affected: 10.0.0 , < 10.0.12 (custom)
Microsoft	.NET 11.0	Affected: 11.0.0 , < 11.0 RC1 (custom)
Microsoft	.NET 8.0	Affected: 8.0.0 , < 8.0.31 (custom)
Microsoft	.NET 9.0	Affected: 9.0.0 , < 9.0.20 (custom)
Microsoft	Microsoft .NET Framework 3.5 AND 4.6.2/4.7/4.7.1/4.7.2	Affected: 3.0.0.0 , < 2.0.50727.8984 & 3.0.30729.8980 & 4.7.4145.0 (custom)
Microsoft	Microsoft .NET Framework 3.5 AND 4.7.2	Affected: 4.7.0 , < 2.0.50727.9070 & 3.0.30729.9068 & 4.7.4145.0 (custom)
Microsoft	Microsoft .NET Framework 3.5 AND 4.8	Affected: 4.8.0 , < 2.0.50727.9070 & 3.0.30729.9068 & 4.8.4806.0 (custom)
Microsoft	Microsoft .NET Framework 3.5 AND 4.8.1	Affected: 4.8.1 , < 2.0.50727.9183 & 3.0.30729.9169 & 4.8.9347.0 (custom)
Microsoft	Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2	Affected: 4.7.0 , < 4.7.4145.0 (custom)
Microsoft	Microsoft .NET Framework 4.8	Affected: 4.8.0 , < 4.8.4806.0 (custom)
Microsoft	Microsoft .NET Framework 4.8.1	Affected: 4.8.0.0 , < 4.8.9347.0 (custom)
Microsoft	Microsoft Visual Studio 2022 version 17.14	Affected: 17.14.0 , < 17.14.40 (custom)
Microsoft	Microsoft Visual Studio 2026 version 18.9	Affected: 18.9.0 , < 18.9.3 (custom)

Date Public

2026-09-08 14:00

Show details on NVD website

JSON

To clipboard

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                  },
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                "timestamp": "2026-09-03T00:00:00+00:00",
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          "tags": [
            "vendor-advisory",
            "patch"
          ],
          "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69522"
        }
      ],
      "title": ".NET and Visual Studio Remote Code Execution Vulnerability"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "f38d906d-7342-40ea-92c1-6c4a2c6478c8",
    "assignerShortName": "microsoft",
    "cveId": "CVE-2026-69522",
    "datePublished": "2026-09-08T17:10:32.415Z",
    "dateReserved": "2026-08-03T21:09:40.782Z",
    "dateUpdated": "2026-09-10T23:03:00.395Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.

Action not permitted

FKIE_CVE-2026-69522

CVE-2026-69522 (GCVE-0-2026-69522)

Tags

Sightings

Nomenclature