Vulnerability-Lookup

CNVD-2026-29408

Vulnerability from cnvd - Published: 2026-07-29

Title

Microsoft Office Sharepoint Server跨站脚本漏洞（CNVD-2026-29408）

Description

Microsoft SharePoint Enterprise Server 2016、Microsoft SharePoint Server 2019及Microsoft SharePoint Server Subscription Edition是微软推出的企业级协作平台，主要用于文档管理、内容发布和工作流协同。 Microsoft Office Sharepoint Server存在跨站脚本漏洞。该漏洞源于网页生成过程中未能正确中和用户输入，攻击者可利用该漏洞执行欺骗攻击。

Severity

中

Patch Name

Microsoft Office Sharepoint Server跨站脚本漏洞（CNVD-2026-29408）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-2026-55135

Reference

https://nvd.nist.gov/vuln/detail/CVE-2026-55135

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-2026-55135",
      "cveUrl": "https://nvd.nist.gov/vuln/detail/CVE-2026-55135"
    }
  },
  "description": "Microsoft SharePoint Enterprise Server 2016\u3001Microsoft SharePoint Server 2019\u53caMicrosoft SharePoint Server Subscription Edition\u662f\u5fae\u8f6f\u63a8\u51fa\u7684\u4f01\u4e1a\u7ea7\u534f\u4f5c\u5e73\u53f0\uff0c\u4e3b\u8981\u7528\u4e8e\u6587\u6863\u7ba1\u7406\u3001\u5185\u5bb9\u53d1\u5e03\u548c\u5de5\u4f5c\u6d41\u534f\u540c\u3002\n\nMicrosoft Office Sharepoint Server\u5b58\u5728\u8de8\u7ad9\u811a\u672c\u6f0f\u6d1e\u3002\u8be5\u6f0f\u6d1e\u6e90\u4e8e\u7f51\u9875\u751f\u6210\u8fc7\u7a0b\u4e2d\u672a\u80fd\u6b63\u786e\u4e2d\u548c\u7528\u6237\u8f93\u5165\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-2026-55135",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2026-29408",
  "openTime": "2026-07-29",
  "patchDescription": "Microsoft SharePoint Enterprise Server 2016\u3001Microsoft SharePoint Server 2019\u53caMicrosoft SharePoint Server Subscription Edition\u662f\u5fae\u8f6f\u63a8\u51fa\u7684\u4f01\u4e1a\u7ea7\u534f\u4f5c\u5e73\u53f0\uff0c\u4e3b\u8981\u7528\u4e8e\u6587\u6863\u7ba1\u7406\u3001\u5185\u5bb9\u53d1\u5e03\u548c\u5de5\u4f5c\u6d41\u534f\u540c\u3002\r\n\r\nMicrosoft Office Sharepoint Server\u5b58\u5728\u8de8\u7ad9\u811a\u672c\u6f0f\u6d1e\u3002\u8be5\u6f0f\u6d1e\u6e90\u4e8e\u7f51\u9875\u751f\u6210\u8fc7\u7a0b\u4e2d\u672a\u80fd\u6b63\u786e\u4e2d\u548c\u7528\u6237\u8f93\u5165\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 Office Sharepoint Server\u8de8\u7ad9\u811a\u672c\u6f0f\u6d1e\uff08CNVD-2026-29408\uff09\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-2026-55135",
  "serverity": "\u4e2d",
  "submitTime": "2026-07-15",
  "title": "Microsoft Office Sharepoint Server\u8de8\u7ad9\u811a\u672c\u6f0f\u6d1e\uff08CNVD-2026-29408\uff09"
}

CVE-2026-55135 (GCVE-0-2026-55135)

Vulnerability from cvelistv5 – Published: 2026-07-14 17:09 – Updated: 2026-09-09 19:39

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 2026-07-16 14:08 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": {
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                "id": "CVE-2026-55135",
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                  },
                  {
                    "Technical Impact": "partial"
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                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-07-16T14:08:11.165075Z",
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          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
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            "baseSeverity": "MEDIUM",
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    "state": "PUBLISHED"
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  "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.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

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.