Vulnerability-Lookup

CNVD-2026-31557

Vulnerability from cnvd - Published: 2026-08-12

Title

Microsoft Office Sharepoint Server跨站脚本漏洞

Description

Microsoft SharePoint Enterprise Server 2016、Microsoft SharePoint Server 2019及Microsoft SharePoint Server Subscription Edition是微软提供的企业级协作与内容管理平台。 Microsoft Office Sharepoint Server存在跨站脚本漏洞。该漏洞源于对网页生成过程中输入的未能正确处理，攻击者可利用该漏洞在网络上执行欺骗攻击。

Severity

中

Patch Name

Microsoft Office Sharepoint Server跨站脚本漏洞的补丁

Patch Description

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-2026-55019

Reference

https://nvd.nist.gov/vuln/detail/CVE-2026-55019

Impacted products

Name
['Microsoft Microsoft SharePoint Server 2019', 'Microsoft Microsoft SharePoint Enterprise Server 2016', 'Microsoft Microsoft SharePoint Server Subscription Edition']

Show details on source website

JSON

To clipboard

{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2026-55019",
      "cveUrl": "https://nvd.nist.gov/vuln/detail/CVE-2026-55019"
    }
  },
  "description": "Microsoft SharePoint Enterprise Server 2016\u3001Microsoft SharePoint Server 2019\u53caMicrosoft SharePoint Server Subscription Edition\u662f\u5fae\u8f6f\u63d0\u4f9b\u7684\u4f01\u4e1a\u7ea7\u534f\u4f5c\u4e0e\u5185\u5bb9\u7ba1\u7406\u5e73\u53f0\u3002\n\nMicrosoft Office Sharepoint Server\u5b58\u5728\u8de8\u7ad9\u811a\u672c\u6f0f\u6d1e \u3002\u8be5\u6f0f\u6d1e\u6e90\u4e8e\u5bf9\u7f51\u9875\u751f\u6210\u8fc7\u7a0b\u4e2d\u8f93\u5165\u7684\u672a\u80fd\u6b63\u786e\u5904\u7406\uff0c\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u5728\u7f51\u7edc\u4e0a\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-2026-55019",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2026-31557",
  "openTime": "2026-08-12",
  "patchDescription": "Microsoft SharePoint Enterprise Server 2016\u3001Microsoft SharePoint Server 2019\u53caMicrosoft SharePoint Server Subscription Edition\u662f\u5fae\u8f6f\u63d0\u4f9b\u7684\u4f01\u4e1a\u7ea7\u534f\u4f5c\u4e0e\u5185\u5bb9\u7ba1\u7406\u5e73\u53f0\u3002\r\n\r\nMicrosoft Office Sharepoint Server\u5b58\u5728\u8de8\u7ad9\u811a\u672c\u6f0f\u6d1e \u3002\u8be5\u6f0f\u6d1e\u6e90\u4e8e\u5bf9\u7f51\u9875\u751f\u6210\u8fc7\u7a0b\u4e2d\u8f93\u5165\u7684\u672a\u80fd\u6b63\u786e\u5904\u7406\uff0c\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u5728\u7f51\u7edc\u4e0a\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 Office Sharepoint Server\u8de8\u7ad9\u811a\u672c\u6f0f\u6d1e\u7684\u8865\u4e01",
  "products": {
    "product": [
      "Microsoft Microsoft SharePoint Server 2019",
      "Microsoft Microsoft SharePoint Enterprise Server 2016",
      "Microsoft Microsoft SharePoint Server Subscription Edition"
    ]
  },
  "referenceLink": "https://nvd.nist.gov/vuln/detail/CVE-2026-55019",
  "serverity": "\u4e2d",
  "submitTime": "2026-07-15",
  "title": "Microsoft Office Sharepoint Server\u8de8\u7ad9\u811a\u672c\u6f0f\u6d1e"
}

CVE-2026-55019 (GCVE-0-2026-55019)

Vulnerability from cvelistv5 – Published: 2026-07-14 17:08 – Updated: 2026-08-20 17:04

Title

Microsoft SharePoint Server Spoofing Vulnerability

Summary

Improper neutralization of input during web page generation ('cross-site scripting') in Microsoft Office SharePoint allows an authorized attacker to perform spoofing over a network.

Severity

4.6 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/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 2026-07-15 13:05 UTC

CWE

CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Assigner

microsoft mitre root

References

1 reference

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

Impacted products

3 products

Vendor	Product	Version
Microsoft	Microsoft SharePoint Enterprise Server 2016	Affected: 16.0.0 , < 16.0.5561.1001 (custom)
Microsoft	Microsoft SharePoint Server 2019	Affected: 16.0.0 , < 16.0.10417.20175 (custom)
Microsoft	Microsoft SharePoint Server Subscription Edition	Affected: 16.0.0 , < 16.0.19725.20434 (custom)

Date Public

2026-07-14 14:00

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-55019",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-07-15T13:05:14.512167Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-07-15T13:28:30.546Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Microsoft SharePoint Enterprise Server 2016",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "16.0.5561.1001",
              "status": "affected",
              "version": "16.0.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
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          ],
          "product": "Microsoft SharePoint Server 2019",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "16.0.10417.20175",
              "status": "affected",
              "version": "16.0.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Microsoft SharePoint Server Subscription Edition",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "16.0.19725.20434",
              "status": "affected",
              "version": "16.0.0",
              "versionType": "custom"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:a:microsoft:sharepoint_server_2016:*:*:*:*:enterprise:*:*:*",
                  "versionEndExcluding": "16.0.5561.1001",
                  "versionStartIncluding": "16.0.0",
                  "vulnerable": true
                },
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                  "versionStartIncluding": "16.0.0",
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                  "versionStartIncluding": "16.0.0",
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              ],
              "negate": false,
              "operator": "OR"
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      "datePublic": "2026-07-14T14:00:00.000Z",
      "descriptions": [
        {
          "lang": "en-US",
          "value": "Improper neutralization of input during web page generation (\u0027cross-site scripting\u0027) in Microsoft Office SharePoint allows an authorized attacker to perform spoofing over a network."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 4.6,
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N/E:U/RL:O/RC:C",
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          "scenarios": [
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              "lang": "en-US",
              "value": "GENERAL"
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      "problemTypes": [
        {
          "descriptions": [
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              "cweId": "CWE-79",
              "description": "CWE-79: Improper Neutralization of Input During Web Page Generation (\u0027Cross-site Scripting\u0027)",
              "lang": "en-US",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-20T17:04:51.380Z",
        "orgId": "f38d906d-7342-40ea-92c1-6c4a2c6478c8",
        "shortName": "microsoft"
      },
      "references": [
        {
          "name": "Microsoft SharePoint Server Spoofing Vulnerability",
          "tags": [
            "vendor-advisory",
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          "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-55019"
        }
      ],
      "title": "Microsoft SharePoint Server Spoofing Vulnerability"
    }
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  "cveMetadata": {
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    "assignerShortName": "microsoft",
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    "datePublished": "2026-07-14T17:08:33.303Z",
    "dateReserved": "2026-06-16T14:12:44.284Z",
    "dateUpdated": "2026-08-20T17:04:51.380Z",
    "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.

Detection rules are retrieved from Rulezet.

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.

Action not permitted

CNVD-2026-31557

CVE-2026-55019 (GCVE-0-2026-55019)

Tags

Sightings

Nomenclature