CVE-2021-34520
HighCVSS 8.1Exploitation Probability (EPSS)
High risk87th percentile - higher than 87% of all known CVEs
Summary
Remote code execution vulnerability in Microsoft SharePoint Server. An attacker could remotely execute code on the server.
Risk Assessment
Compromise of SharePoint server and access to organizational data.
Recommendation
Install security updates for Microsoft SharePoint Server.
Other vulnerabilities in Microsoft SharePoint Server
See all- CVE-2017-8569High
Microsoft SharePoint Server has an elevation of privilege vulnerability due to improper sanitization of a specially crafted web request to an affected SharePoint server.
- CVE-2025-53770CriticalActively exploited
Deserialization of untrusted data in on-premises Microsoft SharePoint Server allows an unauthorized attacker to execute code over a network. Microsoft is aware of an exploit in the wild and is preparing an update.
- CVE-2023-33160High
A vulnerability in Microsoft SharePoint Server allows remote code execution by an attacker. Exploiting this flaw could lead to system takeover.
- CVE-2021-34467High
Vulnerability in Microsoft SharePoint Server allows remote code execution. An attacker could exploit it to run arbitrary code on the SharePoint server.
- CVE-2021-34519Medium
Information disclosure vulnerability in Microsoft SharePoint Server. An attacker could exploit this flaw to gain access to information that should be protected.
- CVE-2021-27076High
Remote Code Execution vulnerability in Microsoft SharePoint Server. Details are not provided in the description.
- CVE-2020-1069High
A remote code execution vulnerability in Microsoft SharePoint Server due to failure to properly identify and filter unsafe ASP.Net web controls. An authenticated attacker could exploit it by creating a specially crafted page. The update corrects how SharePoint Server handles processing of created content.
- CVE-2023-36894Medium
A vulnerability in Microsoft SharePoint Server allows for information disclosure, potentially leading to unauthorized access to sensitive data.
- CVE-2023-36892High
A vulnerability in Microsoft SharePoint Server allows for spoofing, which may lead to unauthorized access to user data. An attacker can exploit this flaw to impersonate a trusted source.
- CVE-2023-36891High
A vulnerability in Microsoft SharePoint Server allows for spoofing, potentially leading to unauthorized access to user data. An attacker could exploit this flaw to impersonate a trusted source.
Original NVD description (English source)
Microsoft SharePoint Server Remote Code Execution Vulnerability