msrc_cve-2025-21204
Vulnerability from csaf_microsoft
Published
2025-04-08 07:00
Modified
2025-06-04 07:00
Summary
Windows Process Activation Elevation of Privilege Vulnerability
Notes
Additional Resources
To determine the support lifecycle for your software, see the Microsoft Support Lifecycle: https://support.microsoft.com/lifecycle
Disclaimer
The information provided in the Microsoft Knowledge Base is provided \"as is\" without warranty of any kind. Microsoft disclaims all warranties, either express or implied, including the warranties of merchantability and fitness for a particular purpose. In no event shall Microsoft Corporation or its suppliers be liable for any damages whatsoever including direct, indirect, incidental, consequential, loss of business profits or special damages, even if Microsoft Corporation or its suppliers have been advised of the possibility of such damages. Some states do not allow the exclusion or limitation of liability for consequential or incidental damages so the foregoing limitation may not apply.
Customer Action
Required. The vulnerability documented by this CVE requires customer action to resolve.
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"\u003ca href=\"https://twitter.com/crispr56338851\"\u003eBochengXiang(@Crispr)\u003c/a\u003e with \u003ca href=\"https://secsys.fudan.edu.cn/\"\u003eFDU\u003c/a\u003e"
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"vulnerabilities": [
{
"cve": "CVE-2025-21204",
"cwe": {
"id": "CWE-59",
"name": "Improper Link Resolution Before File Access (\u0027Link Following\u0027)"
},
"notes": [
{
"category": "general",
"text": "Microsoft",
"title": "Assigning CNA"
},
{
"category": "faq",
"text": "Yes. As of April 9, 2025, the security update (5055547) for Windows 10 for x64-based Systems and Windows 10 for 32-bit Systems are available. Customers running Windows 10 should ensure the update is installed to be protected from this vulnerability.",
"title": "Are the updates for Windows 10 for x64-based Systems and Windows 10 for 32-bit Systems currently available?"
},
{
"category": "faq",
"text": "An authenticated attacker who successfully exploits this vulnerability gains the ability to perform and/or manipulate file management operations on the victim machine in the context of the NT AUTHORITY\\SYSTEM account.",
"title": "How could an attacker exploit this vulnerability?"
},
{
"category": "faq",
"text": "After installing the updates listed in the Security Updates table for your operating system, a new %systemdrive%\\inetpub folder will be created on your device. This folder should not be deleted regardless of whether Internet Information Services (IIS) is active on the target device. This behavior is part of changes that increase protection and does not require any action from IT admins and end users.",
"title": "Does installing the Windows security updates that address this CVE cause visible change on devices?"
},
{
"category": "faq",
"text": "For systems with KB5055528 installed and %systemroot%\\inetpub directory intact, no additional action is required.\nFor systems with KB5055528 installed but %systemroot%\\inetpub directory deleted, immediate remediation is required. If the inetpub directory has been deleted, you need to run the remediation script Set-InetpubFolderAcl.ps1.\nThis script will:\nRecreate the inetpub directory if it has been deleted.\nEnsure that the directory permissions are correctly configured to prevent unauthorized access and potential vulnerabilities related to CVE-2025-21204.\nUpdate ACLs for the DeviceHealthAttestation directory, if it exists. This directory was created on certain Server versions by the February 2025 security updates. The script will update the ACLs for the DeviceHealthAttestation directory to ensure it is secure.",
"title": "What remediation steps do I need to take to protect myself with regard to the %systemroot%\\inetpub directory?"
}
],
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],
"known_affected": [
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"2",
"3",
"4",
"5",
"6",
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]
},
"references": [
{
"category": "self",
"summary": "CVE-2025-21204 Windows Process Activation Elevation of Privilege Vulnerability - HTML",
"url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-21204"
},
{
"category": "self",
"summary": "CVE-2025-21204 Windows Process Activation Elevation of Privilege Vulnerability - CSAF",
"url": "https://msrc.microsoft.com/csaf/advisories/2025/msrc_cve-2025-21204.json"
}
],
"remediations": [
{
"category": "vendor_fix",
"date": "2025-04-08T07:00:00.000Z",
"details": "10.0.26100.3775:Security Update:https://support.microsoft.com/help/5055523",
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],
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},
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"date": "2025-04-08T07:00:00.000Z",
"details": "10.0.17763.7136:Security Update:https://support.microsoft.com/help/5055519",
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"url": "https://support.microsoft.com/help/5055519"
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"product_ids": [
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"product_ids": [
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"url": "https://support.microsoft.com/help/5055518"
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"details": "10.0.22631.5189:Security Update:https://support.microsoft.com/help/5055528",
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"url": "https://support.microsoft.com/help/5055528"
},
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"details": "10.0.25398.1551:Security Update:https://support.microsoft.com/help/5055527",
"product_ids": [
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],
"url": "https://support.microsoft.com/help/5055527"
},
{
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"date": "2025-04-08T07:00:00.000Z",
"details": "10.0.10240.20978:Security Update:https://support.microsoft.com/help/5055547",
"product_ids": [
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],
"url": "https://support.microsoft.com/help/5055547"
},
{
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"date": "2025-04-08T07:00:00.000Z",
"details": "10.0.14393.7969:Security Update:https://support.microsoft.com/help/5055521",
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],
"url": "https://support.microsoft.com/help/5055521"
},
{
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"details": "6.0.6003.23220:Monthly Rollup:https://support.microsoft.com/help/5055609",
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],
"url": "https://support.microsoft.com/help/5055609"
},
{
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"url": "https://support.microsoft.com/help/5055596"
},
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},
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"url": "https://support.microsoft.com/help/5055570"
},
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"date": "2025-04-08T07:00:00.000Z",
"details": "6.2.9200.25423:Monthly Rollup:https://support.microsoft.com/help/5055581",
"product_ids": [
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],
"url": "https://support.microsoft.com/help/5055581"
},
{
"category": "vendor_fix",
"date": "2025-04-08T07:00:00.000Z",
"details": "6.3.9600.22523:Monthly Rollup:https://support.microsoft.com/help/5055557",
"product_ids": [
"29",
"28"
],
"url": "https://support.microsoft.com/help/5055557"
}
],
"scores": [
{
"cvss_v3": {
"attackComplexity": "LOW",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 7.8,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"environmentalsScore": 0.0,
"exploitCodeMaturity": "UNPROVEN",
"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
"remediationLevel": "OFFICIAL_FIX",
"reportConfidence": "CONFIRMED",
"scope": "UNCHANGED",
"temporalScore": 6.8,
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C",
"version": "3.1"
},
"products": [
"1",
"2",
"3",
"4",
"5",
"6",
"7",
"8",
"9",
"10",
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"14",
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"32",
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"34",
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]
}
],
"threats": [
{
"category": "impact",
"details": "Elevation of Privilege"
},
{
"category": "exploit_status",
"details": "Publicly Disclosed:No;Exploited:No;Latest Software Release:Exploitation Less Likely"
}
],
"title": "Windows Process Activation Elevation of Privilege Vulnerability"
}
]
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
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