PT-2021-2278 · Microsoft · Sharepoint Server+2

Published 2021-03-09 · Updated 2025-12-13 · CVE-2021-27076

Positive Technologies (AI Summary)

CVSS v2.0

9.0

High

Base vector

AV:N/AC:L/Au:S/C:C/I:C/A:C

Name of the Vulnerable Software and Affected Versions Microsoft SharePoint Server (affected versions not specified) Microsoft Business Productivity Servers (affected versions not specified) SharePoint Enterprise Server (affected versions not specified) SharePoint Foundation (affected versions not specified)

Description The issue is related to incorrect code generation management in Microsoft products. It allows a remote attacker to execute arbitrary code. The estimated number of potentially affected devices worldwide is not available. There is no information about real-world incidents where this issue was exploited.

Recommendations For Microsoft SharePoint Server, consider restricting access to untrusted data deserialization to minimize the risk of exploitation. For Microsoft Business Productivity Servers, SharePoint Enterprise Server, and SharePoint Foundation, at the moment, there is no information about a newer version that contains a fix for this vulnerability.

Code Injection

Weakness Enumeration

CWE-94

Related Identifiers

BDU:2021-01361

CVE-2021-27076

ZDI-21-276

Affected Products

Business Productivity Servers

Sharepoint Server

Sharepoint Foundation

References · 14

• https://nvd.nist.gov/vuln/detail/CVE-2021-27076 · Security Note
• https://zerodayinitiative.com/advisories/ZDI-21-276 · Security Note
• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-27076 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2021-27076 · Vendor Advisory
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-27076 · Security Note
• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-27076 · Vendor Advisory
• https://bdu.fstec.ru/vul/2021-01361 · Security Note
• https://t.me/cvenotify/11426 · Telegram Post
• https://t.me/aptreports/22594 · Telegram Post
• https://t.me/aptreports/22591 · Telegram Post
• https://t.me/cybersecuritytechnologies/2930 · Telegram Post
• https://t.me/cvenotify/11210 · Telegram Post
• https://t.me/cybersecuritytechnologies/2955 · Telegram Post
• https://cybersecurity-help.cz/vulnerabilities/51300 · Note