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01 Record

CVE-2021-31181

Microsoft SharePoint Remote Code Execution Vulnerability

HighPUBLISHEDCNA: microsoft
CNA base score8.8 CVSS v3.xCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
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02 Description

Microsoft SharePoint Remote Code Execution Vulnerability

03 Exploitation and scoring

Exploitation
Public exploit code exists. CISA's assessment records a public proof of concept. That is not a report of exploitation in the wild.
SSVC decision
  • ExploitationpocPublic proof-of-concept exploit code exists. Not a report of exploitation in the wild.
  • AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
  • Technical ImpacttotalSuccessful exploitation gives total control of the vulnerable component.
CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.
EPSS probability
29.01% probability of exploitation activity in the next 30 days.
EPSS percentile
Equal to or higher than the score of 98.1% of scored records. A rank, not a probability.
NVD base score
8.8 (CVSS v3.x), scored by the NVD independently of the CNA.
NVD CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD analysis status
Modified. NVD last modified this record on 2026-06-17.
Red Hat severity
No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published
2021-05-11 19:11Z5 YR AGO
Last updated
2025-02-28 20:29Z1 YR AGO
Reserved
2021-04-14
Assigning CNA
microsoft
Record state
PUBLISHED
Severity
High (CVSS 8.8)
CNA CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Weaknesses
  • CWE-94Improper Control of Generation of Code ('Code Injection')Base
Data version
5.1
Document digest
f7ff59706f16b63c4ba692a61199f7ddbad6e50278eecb62d6b6f84ded0e0469

05 Affected products

VendorProductVersionsPlatforms
MicrosoftMicrosoft SharePoint Enterprise Server 201616.0.0 to < 16.0.5161.1000x64-based Systems
MicrosoftMicrosoft SharePoint Server 201916.0.0 to < 16.0.10374.20000x64-based Systems
MicrosoftMicrosoft SharePoint Foundation 2013 Service Pack 115.0.0 to < 15.0.5345.1000x64-based Systems

06 References