FKIE_CVE-2026-21531

Vulnerability from fkie_nvd - Published: 2026-02-10 18:16 - Updated: 2026-02-12 15:49
Severity ?
9.8 (Critical) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Summary
Deserialization of untrusted data in Azure SDK allows an unauthorized attacker to execute code over a network.
References
secure@microsoft.comhttps://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21531Vendor Advisory
Impacted products
Vendor Product Version
microsoft azure_conversation_authoring_client_library 1.0.0
microsoft azure_conversation_authoring_client_library 1.0.0
microsoft azure_conversation_authoring_client_library 1.0.0
To clipboard 

{
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:microsoft:azure_conversation_authoring_client_library:1.0.0:beta1:*:*:*:python:*:*",
              "matchCriteriaId": "5F0D2A31-6685-4968-B9BD-8538BD0CD134",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:microsoft:azure_conversation_authoring_client_library:1.0.0:beta2:*:*:*:python:*:*",
              "matchCriteriaId": "6083B261-3037-4BFB-ACC5-B8945AE1046F",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:microsoft:azure_conversation_authoring_client_library:1.0.0:beta3:*:*:*:python:*:*",
              "matchCriteriaId": "CF3829C8-635B-4E0B-9C39-9FEA1A595C57",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Deserialization of untrusted data in Azure SDK allows an unauthorized attacker to execute code over a network."
    }
  ],
  "id": "CVE-2026-21531",
  "lastModified": "2026-02-12T15:49:25.373",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 9.8,
          "baseSeverity": "CRITICAL",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 5.9,
        "source": "secure@microsoft.com",
        "type": "Primary"
      }
    ]
  },
  "published": "2026-02-10T18:16:35.580",
  "references": [
    {
      "source": "secure@microsoft.com",
      "tags": [
        "Vendor Advisory"
      ],
      "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21531"
    }
  ],
  "sourceIdentifier": "secure@microsoft.com",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-502"
        }
      ],
      "source": "secure@microsoft.com",
      "type": "Primary"
    }
  ]
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Sightings

Author Source Type Date

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.