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CVE-2026-85885 (GCVE-0-2026-85885)

Vulnerability from cvelistv5 – Published: 2026-09-17 22:55 – Updated: 2026-09-17 22:55 Exclusively Hosted Service
VLAI
Title
Microsoft 365 Copilot Elevation of Privilege Vulnerability
Summary
Improper neutralization of special elements used in a command ('command injection') in M365 Copilot allows an authorized attacker to elevate privileges over a network.
Severity
9.9 (Critical)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C
CWE
  • CWE-77 - Improper Neutralization of Special Elements used in a Command ('Command Injection')
Assigner
References
Impacted products
Vendor Product Version CPE status
Microsoft Microsoft 365 Copilot Affected: -
    cpe:2.3:a:microsoft:365_copilot:*:*:*:*:*:*:*:*
Create a notification for this product.
Date Public
2026-09-17 14:00
Show details on NVD website
To clipboard 

{
  "containers": {
    "cna": {
      "affected": [
        {
          "product": "Microsoft 365 Copilot",
          "vendor": "Microsoft",
          "versions": [
            {
              "status": "affected",
              "version": "-"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:a:microsoft:365_copilot:*:*:*:*:*:*:*:*",
                  "versionStartIncluding": "-",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "datePublic": "2026-09-17T14:00:00.000Z",
      "descriptions": [
        {
          "lang": "en-US",
          "value": "Improper neutralization of special elements used in a command (\u0027command injection\u0027) in M365 Copilot allows an authorized attacker to elevate privileges over a network."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 9.9,
            "baseSeverity": "CRITICAL",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/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-77",
              "description": "CWE-77: Improper Neutralization of Special Elements used in a Command (\u0027Command Injection\u0027)",
              "lang": "en-US",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-17T22:55:55.696Z",
        "orgId": "f38d906d-7342-40ea-92c1-6c4a2c6478c8",
        "shortName": "microsoft"
      },
      "references": [
        {
          "name": "Microsoft 365 Copilot Elevation of Privilege Vulnerability",
          "tags": [
            "vendor-advisory",
            "patch"
          ],
          "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-85885"
        }
      ],
      "tags": [
        "exclusively-hosted-service"
      ],
      "title": "Microsoft 365 Copilot Elevation of Privilege Vulnerability"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "f38d906d-7342-40ea-92c1-6c4a2c6478c8",
    "assignerShortName": "microsoft",
    "cveId": "CVE-2026-85885",
    "datePublished": "2026-09-17T22:55:55.696Z",
    "dateReserved": "2026-09-04T18:18:19.327Z",
    "dateUpdated": "2026-09-17T22:55:55.696Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "nvd": {
      "cve": {
        "affected": [
          {
            "affectedData": [
              {
                "product": "Microsoft 365 Copilot",
                "vendor": "Microsoft",
                "versions": [
                  {
                    "status": "affected",
                    "version": "-"
                  }
                ]
              }
            ],
            "source": "secure@microsoft.com"
          }
        ],
        "cveTags": [
          {
            "sourceIdentifier": "secure@microsoft.com",
            "tags": [
              "exclusively-hosted-service"
            ]
          }
        ],
        "descriptions": [
          {
            "lang": "en",
            "value": "Improper neutralization of special elements used in a command (\u0027command injection\u0027) in M365 Copilot allows an authorized attacker to elevate privileges over a network."
          }
        ],
        "id": "CVE-2026-85885",
        "lastModified": "2026-09-17T23:18:53.080",
        "metrics": {
          "cvssMetricV31": [
            {
              "cvssData": {
                "attackComplexity": "LOW",
                "attackVector": "NETWORK",
                "availabilityImpact": "HIGH",
                "baseScore": 9.9,
                "baseSeverity": "CRITICAL",
                "confidentialityImpact": "HIGH",
                "integrityImpact": "HIGH",
                "privilegesRequired": "LOW",
                "scope": "CHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H",
                "version": "3.1"
              },
              "exploitabilityScore": 3.1,
              "impactScore": 6.0,
              "source": "secure@microsoft.com",
              "type": "Primary"
            }
          ]
        },
        "published": "2026-09-17T23:18:53.080",
        "references": [
          {
            "source": "secure@microsoft.com",
            "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-85885"
          }
        ],
        "sourceIdentifier": "secure@microsoft.com",
        "vulnStatus": "Received",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-77"
              }
            ],
            "source": "secure@microsoft.com",
            "type": "Primary"
          }
        ]
      }
    }
  }
}



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