FKIE_CVE-2026-26133

Vulnerability from fkie_nvd - Published: 2026-03-16 14:18 - Updated: 2026-04-09 18:16
Severity ?
7.1 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:N
Summary
AI command injection in M365 Copilot allows an unauthorized attacker to disclose information over a network.
References
secure@microsoft.comhttps://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-26133Vendor Advisory
Impacted products
Vendor Product Version
microsoft 365_copilot *
microsoft 365_copilot *
microsoft edge *
microsoft edge *
microsoft excel *
microsoft excel *
microsoft loop *
microsoft onenote *
microsoft onenote -
microsoft outlook *
microsoft outlook *
microsoft outlook -
microsoft power_bi *
microsoft power_bi -
microsoft powerpoint *
microsoft powerpoint *
microsoft teams *
microsoft teams *
microsoft word *
microsoft word *
To clipboard 

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  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "AI command injection in M365 Copilot allows an unauthorized attacker to disclose information over a network."
    },
    {
      "lang": "es",
      "value": "La inyecci\u00f3n de comandos de IA en M365 Copilot permite a un atacante no autorizado divulgar informaci\u00f3n a trav\u00e9s de una red."
    }
  ],
  "id": "CVE-2026-26133",
  "lastModified": "2026-04-09T18:16:57.460",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 7.1,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "LOW",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "REQUIRED",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 2.8,
        "impactScore": 4.2,
        "source": "secure@microsoft.com",
        "type": "Secondary"
      }
    ]
  },
  "published": "2026-03-16T14:18:26.337",
  "references": [
    {
      "source": "secure@microsoft.com",
      "tags": [
        "Vendor Advisory"
      ],
      "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-26133"
    }
  ],
  "sourceIdentifier": "secure@microsoft.com",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-77"
        }
      ],
      "source": "secure@microsoft.com",
      "type": "Primary"
    },
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-77"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Secondary"
    }
  ]
}


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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.