CVE-2021-26420 : Microsoft SharePoint Server Remote Code Execution Vulnerability

Microsoft SharePoint Server Remote Code Execution Vulnerability

Published 2021-06-08 23:15:08

Updated 2023-08-01 23:15:12

View at NVD, CVE.org

Vulnerability category: Execute code

Products affected by CVE-2021-26420

Microsoft » Sharepoint Server » Version: 2019
cpe:2.3:a:microsoft:sharepoint_server:2019:*:*:*:*:*:*:*
Matching versions
Microsoft » Sharepoint Foundation » Version: 2013 Update SP1
cpe:2.3:a:microsoft:sharepoint_foundation:2013:sp1:*:*:*:*:*:*
Matching versions
Microsoft » Sharepoint Enterprise Server » Version: 2016
cpe:2.3:a:microsoft:sharepoint_enterprise_server:2016:*:*:*:*:*:*:*
Matching versions

EPSS FAQ

13.88%

Probability of exploitation activity in the next 30 days EPSS Score History

~ 96 %

Percentile, the proportion of vulnerabilities that are scored at or less

Base Score	Base Severity	CVSS Vector	Exploitability Score	Impact Score	Score Source
6.5	MEDIUM	AV:N/AC:L/Au:S/C:P/I:P/A:P	8.0	6.4	NIST
Access Vector: Network Access Complexity: Low Authentication: Single Confidentiality Impact: Partial Integrity Impact: Partial Availability Impact: Partial
8.8	HIGH	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H	2.8	5.9	NIST
Attack Vector: Network Attack Complexity: Low Privileges Required: Low User Interaction: None Scope: Unchanged Confidentiality: High Integrity: High Availability: High
7.1	HIGH	CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:L	1.6	5.5	Microsoft Corporation
Attack Vector: Network Attack Complexity: High Privileges Required: Low User Interaction: None Scope: Unchanged Confidentiality: High Integrity: High Availability: Low

https://www.zerodayinitiative.com/advisories/ZDI-21-755/

ZDI-21-755 | Zero Day Initiative
Third Party Advisory;VDB Entry
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-26420

CVE-2021-26420 - Security Update Guide - Microsoft - Microsoft SharePoint Server Remote Code Execution Vulnerability
Patch;Vendor Advisory

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