Vulnerability-Lookup

CNVD-2026-12557

Vulnerability from cnvd - Published: 2026-03-04

Title

Microsoft Outlook信息泄露漏洞（CNVD-2026-12557）

Description

Microsoft Outlook是美国微软（Microsoft）公司的一套电子邮件应用程序。 Microsoft Outlook存在信息泄露漏洞。该漏洞源于应用对于敏感信息保护不足，攻击者可利用该漏洞执行欺骗攻击。

Severity

高

Patch Name

Microsoft Outlook信息泄露漏洞（CNVD-2026-12557）的补丁

Patch Description

Microsoft Outlook是美国微软（Microsoft）公司的一套电子邮件应用程序。 Microsoft Outlook存在信息泄露漏洞。该漏洞源于应用对于敏感信息保护不足，攻击者可利用该漏洞执行欺骗攻击。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

厂商已发布了漏洞修复程序，请及时关注更新： https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21260

Reference

https://nvd.nist.gov/vuln/detail/CVE-2026-21260

Impacted products

Name
['Microsoft outlook 2016', 'Microsoft SharePoint Enterprise Server 2016', 'Microsoft Office 2019', 'Microsoft SharePoint Server 2019', 'Microsoft 365 Apps for Enterprise', 'Microsoft SharePoint Server Subscription Edition', 'Microsoft Office LTSC 2021', 'Microsoft Microsoft Office LTSC 2024']

Show details on source website

JSON

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{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2026-21260",
      "cveUrl": "https://nvd.nist.gov/vuln/detail/CVE-2026-21260"
    }
  },
  "description": "Microsoft Outlook\u662f\u7f8e\u56fd\u5fae\u8f6f\uff08Microsoft\uff09\u516c\u53f8\u7684\u4e00\u5957\u7535\u5b50\u90ae\u4ef6\u5e94\u7528\u7a0b\u5e8f\u3002\n\nMicrosoft Outlook\u5b58\u5728\u4fe1\u606f\u6cc4\u9732\u6f0f\u6d1e\u3002\u8be5\u6f0f\u6d1e\u6e90\u4e8e\u5e94\u7528\u5bf9\u4e8e\u654f\u611f\u4fe1\u606f\u4fdd\u62a4\u4e0d\u8db3\uff0c\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u6267\u884c\u6b3a\u9a97\u653b\u51fb\u3002",
  "formalWay": "\u5382\u5546\u5df2\u53d1\u5e03\u4e86\u6f0f\u6d1e\u4fee\u590d\u7a0b\u5e8f\uff0c\u8bf7\u53ca\u65f6\u5173\u6ce8\u66f4\u65b0\uff1a\r\nhttps://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21260",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2026-12557",
  "openTime": "2026-03-04",
  "patchDescription": "Microsoft Outlook\u662f\u7f8e\u56fd\u5fae\u8f6f\uff08Microsoft\uff09\u516c\u53f8\u7684\u4e00\u5957\u7535\u5b50\u90ae\u4ef6\u5e94\u7528\u7a0b\u5e8f\u3002\r\n\r\nMicrosoft Outlook\u5b58\u5728\u4fe1\u606f\u6cc4\u9732\u6f0f\u6d1e\u3002\u8be5\u6f0f\u6d1e\u6e90\u4e8e\u5e94\u7528\u5bf9\u4e8e\u654f\u611f\u4fe1\u606f\u4fdd\u62a4\u4e0d\u8db3\uff0c\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u6267\u884c\u6b3a\u9a97\u653b\u51fb\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 Outlook\u4fe1\u606f\u6cc4\u9732\u6f0f\u6d1e\uff08CNVD-2026-12557\uff09\u7684\u8865\u4e01",
  "products": {
    "product": [
      "Microsoft outlook 2016",
      "Microsoft SharePoint Enterprise Server 2016",
      "Microsoft Office 2019",
      "Microsoft SharePoint Server 2019",
      "Microsoft 365 Apps for Enterprise",
      "Microsoft SharePoint Server Subscription Edition",
      "Microsoft Office LTSC 2021",
      "Microsoft Microsoft Office LTSC 2024"
    ]
  },
  "referenceLink": "https://nvd.nist.gov/vuln/detail/CVE-2026-21260",
  "serverity": "\u9ad8",
  "submitTime": "2026-03-02",
  "title": "Microsoft Outlook\u4fe1\u606f\u6cc4\u9732\u6f0f\u6d1e\uff08CNVD-2026-12557\uff09"
}

CVE-2026-21260 (GCVE-0-2026-21260)

Vulnerability from cvelistv5 – Published: 2026-02-10 17:51 – Updated: 2026-04-10 13:21

Title

Microsoft Outlook Spoofing Vulnerability

Summary

Exposure of sensitive information to an unauthorized actor in Microsoft Office Outlook allows an unauthorized attacker to perform spoofing over a network.

Severity ?

7.5 (High)


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

CWE

CWE-200 - Exposure of Sensitive Information to an Unauthorized Actor

Assigner

microsoft

References

URL

Tags

https://msrc.microsoft.com/update-guide/vulnerabi…

vendor-advisorypatch

Impacted products

Vendor

Product

Version

Microsoft

Microsoft 365 Apps for Enterprise

Affected: 16.0.1 , < https://aka.ms/OfficeSecurityReleases (custom)

Microsoft	Microsoft Office 2019	Affected: 19.0.0 , < https://aka.ms/OfficeSecurityReleases (custom)
Microsoft	Microsoft Office LTSC 2021	Affected: 16.0.1 , < https://aka.ms/OfficeSecurityReleases (custom)
Microsoft	Microsoft Office LTSC 2024	Affected: 16.0.0 , < https://aka.ms/OfficeSecurityReleases (custom)
Microsoft	Microsoft Outlook 2016	Affected: 16.0.0.0 , < 16.0.5539.1002 (custom)
Microsoft	Microsoft SharePoint Enterprise Server 2016	Affected: 16.0.0 , < 16.0.5539.1002 (custom)
Microsoft	Microsoft SharePoint Server 2019	Affected: 16.0.0 , < 16.0.10417.20097 (custom)
Microsoft	Microsoft SharePoint Server Subscription Edition	Affected: 16.0.0 , < 16.0.19127.20518 (custom)

Date Public ?

2026-02-10 16:00

Show details on NVD website

JSON

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{
  "containers": {
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      {
        "metrics": [
          {
            "other": {
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                "id": "CVE-2026-21260",
                "options": [
                  {
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                  },
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                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-02-11T15:27:07.913012Z",
                "version": "2.0.3"
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        "providerMetadata": {
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          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
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          "versions": [
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}

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.

Action not permitted

CNVD-2026-12557

CVE-2026-21260 (GCVE-0-2026-21260)

Tags

Sightings

Nomenclature