High severity · published Jul 16, 2021
CVE-2021-34446
Windows HTML Platforms Security Feature Bypass Vulnerability
8.0
CVSS
2%
EPSS
No
On KEV
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:N
Attack vector
Network
Complexity
High
Privileges
None
User interaction
Required
Confidentiality
High
Integrity
High
Availability
None
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)2.0% · higher than 81% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
WI
Windows · Microsoft
20h2; 21h1; 1607; 1809; 1909; 2004 · source: NVD
W7
Windows 7 · Microsoft
All versions, or not specified · source: NVD
W8
Windows 8.1 · Microsoft
All versions, or not specified · source: NVD
WR
Windows RT 8.1 · Microsoft
All versions, or not specified · source: NVD
WS
Windows Server 2008 · Microsoft
r2 · source: NVD
WS
Windows Server 2012 · Microsoft
r2 · source: NVD
WS
Windows Server 2016 · Microsoft
All versions, or not specified · source: NVD
WS
Windows Server 2019 · Microsoft
All versions, or not specified · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-34446
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-34446
msrc.microsoft.com
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-34446
Patch
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-34446
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