cve-2021-40444
Vulnerability from cvelistv5
Published
2021-09-15 11:24
Modified
2024-08-04 02:44
Severity ?
EPSS score ?
Summary
Microsoft MSHTML Remote Code Execution Vulnerability
References
| ▼ | URL | Tags | |
|---|---|---|---|
| secure@microsoft.com | http://packetstormsecurity.com/files/164210/Microsoft-Windows-MSHTML-Overview.html | Third Party Advisory, VDB Entry | |
| secure@microsoft.com | http://packetstormsecurity.com/files/165214/Microsoft-Office-Word-MSHTML-Remote-Code-Execution.html | Exploit, Third Party Advisory, VDB Entry | |
| secure@microsoft.com | http://packetstormsecurity.com/files/167317/Microsoft-Office-MSDT-Follina-Proof-Of-Concept.html | Exploit, Third Party Advisory, VDB Entry | |
| secure@microsoft.com | https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-40444 | Mitigation, Patch, Vendor Advisory |
Impacted products
CISA Known exploited vulnerability
Data from the Known Exploited Vulnerabilities Catalog
Date added: 2021-11-03
Due date: 2021-11-17
Required action: Apply updates per vendor instructions.
Used in ransomware: Known
Notes: https://nvd.nist.gov/vuln/detail/CVE-2021-40444
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"shortDescription": "Microsoft MSHTML contains a unspecified vulnerability that allows for remote code execution.",
"vendorProject": "Microsoft",
"vulnerabilityName": "Microsoft MSHTML Remote Code Execution Vulnerability"
},
"nvd": "{\"cve\":{\"id\":\"CVE-2021-40444\",\"sourceIdentifier\":\"secure@microsoft.com\",\"published\":\"2021-09-15T12:15:16.467\",\"lastModified\":\"2024-07-29T19:38:46.307\",\"vulnStatus\":\"Analyzed\",\"cveTags\":[],\"cisaExploitAdd\":\"2021-11-03\",\"cisaActionDue\":\"2021-11-17\",\"cisaRequiredAction\":\"Apply updates per vendor instructions.\",\"cisaVulnerabilityName\":\"Microsoft MSHTML Remote Code Execution Vulnerability\",\"descriptions\":[{\"lang\":\"en\",\"value\":\"\u003cp\u003eMicrosoft is investigating reports of a remote code execution vulnerability in MSHTML that affects Microsoft Windows. Microsoft is aware of targeted attacks that attempt to exploit this vulnerability by using specially-crafted Microsoft Office documents.\u003c/p\u003e\\n\u003cp\u003eAn attacker could craft a malicious ActiveX control to be used by a Microsoft Office document that hosts the browser rendering engine. The attacker would then have to convince the user to open the malicious document. Users whose accounts are configured to have fewer user rights on the system could be less impacted than users who operate with administrative user rights.\u003c/p\u003e\\n\u003cp\u003eMicrosoft Defender Antivirus and Microsoft Defender for Endpoint both provide detection and protections for the known vulnerability. Customers should keep antimalware products up to date. Customers who utilize automatic updates do not need to take additional action. Enterprise customers who manage updates should select the detection build 1.349.22.0 or newer and deploy it across their environments. Microsoft Defender for Endpoint alerts will be displayed as: \u201cSuspicious Cpl File Execution\u201d.\u003c/p\u003e\\n\u003cp\u003eUpon completion of this investigation, Microsoft will take the appropriate action to help protect our customers. This may include providing a security update through our monthly release process or providing an out-of-cycle security update, depending on customer needs.\u003c/p\u003e\\n\u003cp\u003ePlease see the \u003cstrong\u003eMitigations\u003c/strong\u003e and \u003cstrong\u003eWorkaround\u003c/strong\u003e sections for important information about steps you can take to protect your system from this vulnerability.\u003c/p\u003e\\n\u003cp\u003e\u003cstrong\u003eUPDATE\u003c/strong\u003e September 14, 2021: Microsoft has released security updates to address this vulnerability. Please see the Security Updates table for the applicable update for your system. We recommend that you install these updates immediately. Please see the FAQ for important information about which updates are applicable to your system.\u003c/p\u003e\\n\"},{\"lang\":\"es\",\"value\":\"Una Vulnerabilidad de Ejecuci\u00f3n de C\u00f3digo Remota de Microsoft MSHTML\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"secure@microsoft.com\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:H/A:L\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"REQUIRED\",\"scope\":\"CHANGED\",\"confidentialityImpact\":\"LOW\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"LOW\",\"baseScore\":8.8,\"baseSeverity\":\"HIGH\"},\"exploitabilityScore\":2.8,\"impactScore\":5.3},{\"source\":\"nvd@nist.gov\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"REQUIRED\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\",\"baseScore\":7.8,\"baseSeverity\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":5.9}],\"cvssMetricV2\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"2.0\",\"vectorString\":\"AV:N/AC:M/Au:N/C:P/I:P/A:P\",\"accessVector\":\"NETWORK\",\"accessComplexity\":\"MEDIUM\",\"authentication\":\"NONE\",\"confidentialityImpact\":\"PARTIAL\",\"integrityImpact\":\"PARTIAL\",\"availabilityImpact\":\"PARTIAL\",\"baseScore\":6.8},\"baseSeverity\":\"MEDIUM\",\"exploitabilityScore\":8.6,\"impactScore\":6.4,\"acInsufInfo\":false,\"obtainAllPrivilege\":false,\"obtainUserPrivilege\":false,\"obtainOtherPrivilege\":false,\"userInteractionRequired\":true}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-22\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:microsoft:windows_10_1507:*:*:*:*:*:*:*:*\",\"versionEndExcluding\":\"10.0.10240.19060\",\"matchCriteriaId\":\"C1658517-428C-4FAF-8EEE-3FD68557AAD1\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:microsoft:windows_10_1607:*:*:*:*:*:*:*:*\",\"versionEndExcluding\":\"10.0.14393.4651\",\"matchCriteriaId\":\"4BF6C51E-7240-457D-A36C-5494AEE41AB1\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:*:*\",\"versionEndExcluding\":\"10.0.17763.2183\",\"matchCriteriaId\":\"1673EF18-FB21-450C-B75D-89279B6779FA\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:microsoft:windows_10_1909:*:*:*:*:*:*:*:*\",\"versionEndExcluding\":\"10.0.18363.1801\",\"matchCriteriaId\":\"F3F77B0B-2A62-4E21-B042-BB86ABA68BE3\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:microsoft:windows_10_2004:*:*:*:*:*:*:*:*\",\"versionEndExcluding\":\"10.0.19041.1237\",\"matchCriteriaId\":\"F4E719E7-7D50-49F6-ABD4-77B1F7ECC68C\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:microsoft:windows_10_20h2:*:*:*:*:*:*:*:*\",\"versionEndExcluding\":\"10.0.19042.1237\",\"matchCriteriaId\":\"71B3072F-0DB3-4C23-AD96-62BF71345E61\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:microsoft:windows_10_21h1:*:*:*:*:*:*:*:*\",\"versionEndExcluding\":\"10.0.19043.1237\",\"matchCriteriaId\":\"CB038EC1-8E36-48C1-8E2E-3B8B6585D25E\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:microsoft:windows_7:-:sp1:*:*:*:*:*:*\",\"matchCriteriaId\":\"C2B1C231-DE19-4B8F-A4AA-5B3A65276E46\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:microsoft:windows_8.1:-:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"E93068DB-549B-45AB-8E5C-00EB5D8B5CF8\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:microsoft:windows_rt_8.1:-:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"C6CE5198-C498-4672-AF4C-77AB4BE06C5C\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:microsoft:windows_server_2004:*:*:*:*:*:*:*:*\",\"versionEndExcluding\":\"10.0.19041.1237\",\"matchCriteriaId\":\"046119DC-43BF-4077-9721-12E2EFD7F492\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:microsoft:windows_server_2008:-:sp2:*:*:*:*:*:*\",\"matchCriteriaId\":\"5F422A8C-2C4E-42C8-B420-E0728037E15C\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:microsoft:windows_server_2008:r2:sp1:*:*:*:*:x64:*\",\"matchCriteriaId\":\"AF07A81D-12E5-4B1D-BFF9-C8D08C32FF4F\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:microsoft:windows_server_2012:-:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"A7DF96F8-BA6A-4780-9CA3-F719B3F81074\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:microsoft:windows_server_2012:-:r2:*:*:*:*:*:*\",\"matchCriteriaId\":\"5F2558DF-2D1F-46BA-ABF1-08522D33268E\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:microsoft:windows_server_2016:*:*:*:*:*:*:*:*\",\"versionEndExcluding\":\"10.0.14393.4651\",\"matchCriteriaId\":\"EAF9D18C-B459-48F2-8451-20E7B04EAD36\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:*:*\",\"versionEndExcluding\":\"10.0.17763.2183\",\"matchCriteriaId\":\"8867C828-131C-466E-9A35-80184659D540\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:microsoft:windows_server_2022:*:*:*:*:*:*:*:*\",\"versionEndExcluding\":\"10.0.20348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Party Advisory\",\"VDB Entry\"]},{\"url\":\"http://packetstormsecurity.com/files/165214/Microsoft-Office-Word-MSHTML-Remote-Code-Execution.html\",\"source\":\"secure@microsoft.com\",\"tags\":[\"Exploit\",\"Third Party Advisory\",\"VDB Entry\"]},{\"url\":\"http://packetstormsecurity.com/files/167317/Microsoft-Office-MSDT-Follina-Proof-Of-Concept.html\",\"source\":\"secure@microsoft.com\",\"tags\":[\"Exploit\",\"Third Party Advisory\",\"VDB Entry\"]},{\"url\":\"https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-40444\",\"source\":\"secure@microsoft.com\",\"tags\":[\"Mitigation\",\"Patch\",\"Vendor Advisory\"]}]}}"
}
}
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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.