Vulnerability-Lookup

CNVD-2026-19435

Vulnerability from cnvd - Published: 2026-05-08

Title

Microsoft PowerShell安全功能绕过漏洞

Description

Microsoft PowerShell是美国微软（Microsoft）公司的一种由微软开发的跨平台任务自动化解决方案，包含命令行 Shell、脚本语言和配置管理框架。 Microsoft PowerShell存在安全功能绕过漏洞，攻击者可利用该漏洞绕过安全功能。

Severity

高

Patch Name

Microsoft PowerShell安全功能绕过漏洞的补丁

Patch Description

Microsoft PowerShell是美国微软（Microsoft）公司的一种由微软开发的跨平台任务自动化解决方案，包含命令行 Shell、脚本语言和配置管理框架。 Microsoft PowerShell存在安全功能绕过漏洞，攻击者可利用该漏洞绕过安全功能。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-2026-26143

Reference

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-26143

Impacted products

Name
['Microsoft PowerShell 7.4', 'Microsoft PowerShell 7.5']

Show details on source website

JSON

To clipboard

{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2026-26143",
      "cveUrl": "https://nvd.nist.gov/vuln/detail/CVE-2026-26143"
    }
  },
  "description": "Microsoft PowerShell\u662f\u7f8e\u56fd\u5fae\u8f6f\uff08Microsoft\uff09\u516c\u53f8\u7684\u4e00\u79cd\u7531\u5fae\u8f6f\u5f00\u53d1\u7684\u8de8\u5e73\u53f0\u4efb\u52a1\u81ea\u52a8\u5316\u89e3\u51b3\u65b9\u6848\uff0c\u5305\u542b\u547d\u4ee4\u884c Shell\u3001\u811a\u672c\u8bed\u8a00\u548c\u914d\u7f6e\u7ba1\u7406\u6846\u67b6\u3002 \n\nMicrosoft PowerShell\u5b58\u5728\u5b89\u5168\u529f\u80fd\u7ed5\u8fc7\u6f0f\u6d1e\uff0c\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u7ed5\u8fc7\u5b89\u5168\u529f\u80fd\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-2026-26143",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2026-19435",
  "openTime": "2026-05-08",
  "patchDescription": "Microsoft PowerShell\u662f\u7f8e\u56fd\u5fae\u8f6f\uff08Microsoft\uff09\u516c\u53f8\u7684\u4e00\u79cd\u7531\u5fae\u8f6f\u5f00\u53d1\u7684\u8de8\u5e73\u53f0\u4efb\u52a1\u81ea\u52a8\u5316\u89e3\u51b3\u65b9\u6848\uff0c\u5305\u542b\u547d\u4ee4\u884c Shell\u3001\u811a\u672c\u8bed\u8a00\u548c\u914d\u7f6e\u7ba1\u7406\u6846\u67b6\u3002 \r\n\r\nMicrosoft PowerShell\u5b58\u5728\u5b89\u5168\u529f\u80fd\u7ed5\u8fc7\u6f0f\u6d1e\uff0c\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u7ed5\u8fc7\u5b89\u5168\u529f\u80fd\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 PowerShell\u5b89\u5168\u529f\u80fd\u7ed5\u8fc7\u6f0f\u6d1e\u7684\u8865\u4e01",
  "products": {
    "product": [
      "Microsoft PowerShell 7.4",
      "Microsoft PowerShell 7.5"
    ]
  },
  "referenceLink": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-26143",
  "serverity": "\u9ad8",
  "submitTime": "2026-04-21",
  "title": "Microsoft PowerShell\u5b89\u5168\u529f\u80fd\u7ed5\u8fc7\u6f0f\u6d1e"
}

CVE-2026-26143 (GCVE-0-2026-26143)

Vulnerability from cvelistv5 – Published: 2026-04-14 16:57 – Updated: 2026-08-14 16:30

Title

Microsoft PowerShell Security Feature Bypass Vulnerability

Summary

Improper input validation in Microsoft PowerShell allows an unauthorized attacker to bypass a security feature locally.

Severity

7.8 (High)


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

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-04-16 13:24 UTC

CWE

CWE-20 - Improper Input Validation

Assigner

microsoft mitre root

References

1 reference

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

Impacted products

2 products

Vendor	Product	Version
Microsoft	PowerShell 7.4	Affected: 7.4.0 , < 7.4.14 (custom)
Microsoft	PowerShell 7.5	Affected: 7.5.0 , < 7.5.5 (custom)

Date Public

2026-04-14 14:00

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-26143",
                "options": [
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                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-04-16T13:24:29.195623Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-04-16T13:26:39.733Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
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          "vendor": "Microsoft",
          "versions": [
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              "status": "affected",
              "version": "7.4.0",
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          "vendor": "Microsoft",
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              "status": "affected",
              "version": "7.5.0",
              "versionType": "custom"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:a:microsoft:powershell:*:-:*:*:*:*:*:*",
                  "versionEndExcluding": "7.5.5",
                  "versionStartIncluding": "7.5.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:a:microsoft:powershell:*:-:*:*:*:*:*:*",
                  "versionEndExcluding": "7.4.14",
                  "versionStartIncluding": "7.4.0",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "datePublic": "2026-04-14T14:00:00.000Z",
      "descriptions": [
        {
          "lang": "en-US",
          "value": "Improper input validation in Microsoft PowerShell allows an unauthorized attacker to bypass a security feature locally."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C",
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          "scenarios": [
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            }
          ]
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      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-20",
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            }
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      "providerMetadata": {
        "dateUpdated": "2026-08-14T16:30:50.761Z",
        "orgId": "f38d906d-7342-40ea-92c1-6c4a2c6478c8",
        "shortName": "microsoft"
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      "references": [
        {
          "name": "Microsoft PowerShell Security Feature Bypass Vulnerability",
          "tags": [
            "vendor-advisory",
            "patch"
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          "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-26143"
        }
      ],
      "title": "Microsoft PowerShell Security Feature Bypass Vulnerability"
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  "cveMetadata": {
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    "assignerShortName": "microsoft",
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    "datePublished": "2026-04-14T16:57:53.686Z",
    "dateReserved": "2026-02-11T16:24:51.134Z",
    "dateUpdated": "2026-08-14T16:30:50.761Z",
    "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.
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.