Vulnerability-Lookup

CNVD-2026-12910

Vulnerability from cnvd - Published: 2026-03-09

Title

Microsoft Teams访问控制错误漏洞

Description

Microsoft Teams是美国微软（Microsoft）公司的一款用于在线会议、聊天、云存储功能的软件。 Microsoft Teams存在访问控制错误漏洞，该漏洞源于访问控制不当，攻击者可利用该漏洞导致未经授权的攻击者通过网络泄露信息。

Severity

高

Patch Name

Microsoft Teams访问控制错误漏洞的补丁

Patch Description

Microsoft Teams是美国微软（Microsoft）公司的一款用于在线会议、聊天、云存储功能的软件。 Microsoft Teams存在访问控制错误漏洞，该漏洞源于访问控制不当，攻击者可利用该漏洞导致未经授权的攻击者通过网络泄露信息。目前，供应商发布了安全公告及相关补丁信息，修复了此漏洞。

Formal description

目前厂商已发布升级补丁以修复漏洞，补丁获取链接： https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21535

Reference

https://nvd.nist.gov/vuln/detail/CVE-2024-57234

Impacted products

Name
Microsoft Teams

Show details on source website

JSON

To clipboard

{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2026-21535",
      "cveUrl": "https://nvd.nist.gov/vuln/detail/CVE-2026-21535"
    }
  },
  "description": "Microsoft Teams\u662f\u7f8e\u56fd\u5fae\u8f6f\uff08Microsoft\uff09\u516c\u53f8\u7684\u4e00\u6b3e\u7528\u4e8e\u5728\u7ebf\u4f1a\u8bae\u3001\u804a\u5929\u3001\u4e91\u5b58\u50a8\u529f\u80fd\u7684\u8f6f\u4ef6\u3002\n\nMicrosoft Teams\u5b58\u5728\u8bbf\u95ee\u63a7\u5236\u9519\u8bef\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8e\u8bbf\u95ee\u63a7\u5236\u4e0d\u5f53\uff0c\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u5bfc\u81f4\u672a\u7ecf\u6388\u6743\u7684\u653b\u51fb\u8005\u901a\u8fc7\u7f51\u7edc\u6cc4\u9732\u4fe1\u606f\u3002",
  "formalWay": "\u76ee\u524d\u5382\u5546\u5df2\u53d1\u5e03\u5347\u7ea7\u8865\u4e01\u4ee5\u4fee\u590d\u6f0f\u6d1e\uff0c\u8865\u4e01\u83b7\u53d6\u94fe\u63a5\uff1a\r\nhttps://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21535",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2026-12910",
  "openTime": "2026-03-09",
  "patchDescription": "Microsoft Teams\u662f\u7f8e\u56fd\u5fae\u8f6f\uff08Microsoft\uff09\u516c\u53f8\u7684\u4e00\u6b3e\u7528\u4e8e\u5728\u7ebf\u4f1a\u8bae\u3001\u804a\u5929\u3001\u4e91\u5b58\u50a8\u529f\u80fd\u7684\u8f6f\u4ef6\u3002\r\n\r\nMicrosoft Teams\u5b58\u5728\u8bbf\u95ee\u63a7\u5236\u9519\u8bef\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8e\u8bbf\u95ee\u63a7\u5236\u4e0d\u5f53\uff0c\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u5bfc\u81f4\u672a\u7ecf\u6388\u6743\u7684\u653b\u51fb\u8005\u901a\u8fc7\u7f51\u7edc\u6cc4\u9732\u4fe1\u606f\u3002\u76ee\u524d\uff0c\u4f9b\u5e94\u5546\u53d1\u5e03\u4e86\u5b89\u5168\u516c\u544a\u53ca\u76f8\u5173\u8865\u4e01\u4fe1\u606f\uff0c\u4fee\u590d\u4e86\u6b64\u6f0f\u6d1e\u3002",
  "patchName": "Microsoft Teams\u8bbf\u95ee\u63a7\u5236\u9519\u8bef\u6f0f\u6d1e\u7684\u8865\u4e01",
  "products": {
    "product": "Microsoft Teams"
  },
  "referenceLink": "https://nvd.nist.gov/vuln/detail/CVE-2024-57234",
  "serverity": "\u9ad8",
  "submitTime": "2026-03-04",
  "title": "Microsoft Teams\u8bbf\u95ee\u63a7\u5236\u9519\u8bef\u6f0f\u6d1e"
}

CVE-2026-21535 (GCVE-0-2026-21535)

Vulnerability from cvelistv5 – Published: 2026-02-19 22:06 – Updated: 2026-08-19 16:26 Exclusively Hosted Service

Title

Microsoft Teams Information Disclosure Vulnerability

Summary

Improper access control in Microsoft Teams allows an unauthorized attacker to disclose information over a network.

Severity

8.2 (High)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-02-23 18:20 UTC

CWE

CWE-284 - Improper Access Control

Assigner

microsoft mitre root Scorecard

References

1 reference

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

Impacted products

1 product

Vendor	Product	Version
Microsoft	Microsoft Teams	Affected: - cpe:2.3:a:microsoft:teams::::::::

Date Public

2026-02-19 16:00

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-21535",
                "options": [
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                    "Exploitation": "none"
                  },
                  {
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                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-02-23T18:20:57.388093Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-02-23T18:21:23.768Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
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          "vendor": "Microsoft",
          "versions": [
            {
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      ],
      "cpeApplicability": [
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              "cpeMatch": [
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                  "vulnerable": true
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              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "datePublic": "2026-02-19T16:00:00.000Z",
      "descriptions": [
        {
          "lang": "en-US",
          "value": "Improper access control in Microsoft Teams allows an unauthorized attacker to disclose information over a network."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 8.2,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N/E:U/RL:O/RC:C",
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        }
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    "dateReserved": "2025-12-30T18:10:54.847Z",
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    "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.

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.
Browse all ATT&CK techniques and the vulnerabilities related to each.

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Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

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CNVD-2026-12910

CVE-2026-21535 (GCVE-0-2026-21535)

Tags

Sightings

Nomenclature

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