2021-34534 | Microsoft Windows MSHTML Platform Remote Code Execution
|CVSS Meta Temp Score
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|Current Exploit Price (≈)
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|CTI Interest Score
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A vulnerability was found in Microsoft Windows 10 20H2 up to Server 2019 (Operating System) and classified as problematic. This issue affects some unknown processing of the component MSHTML Platform. Impacted is confidentiality, integrity, and availability. The summary by CVE is:
Windows MSHTML Platform Remote Code Execution Vulnerability
The weakness was presented 08/10/2021 as confirmed security guidance (Website). The advisory is shared at portal.msrc.microsoft.com. The identification of this vulnerability is CVE-2021-34534 since 06/09/2021. The exploitation is known to be difficult. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. It demands that the victim is doing some kind of user interaction. Neither technical details nor an exploit are publicly available. The price for an exploit might be around USD $5k-$25k at the moment (estimation calculated on 08/15/2021).
Applying a patch is able to eliminate this problem. A possible mitigation has been published immediately after the disclosure of the vulnerability.
VulDB Meta Base Score: 5.9
VulDB Meta Temp Score: 5.1
Vendor Base Score (Microsoft): 6.8
Vendor Vector (Microsoft): 🔒
06/09/2021 CVE assigned
08/10/2021 +62 days VulDB entry created
08/10/2021 +0 days Advisory disclosed
08/10/2021 +0 days Countermeasure disclosed
08/15/2021 +5 days VulDB last updateVendor: https://www.microsoft.com/
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