Microsoft Office SharePoint
CVE-2021-31173 — Microsoft SharePoint Server Information Disclosure Vulnerability
Executive Summary
None
Overview
5.3
CVSS MEDIUM
Important
MS Severity
Not Exploited
MS Exploit Status
Less Likely
MS Exploit Likelihood
CVSS Vector
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N/E:P/RL:O/RC:C
ATTACK VECTOR
Network
ATTACK COMPLEXITY
High
PRIVILEGES REQUIRED
Low
USER INTERACTION
None
SCOPE
Unchanged
CONFIDENTIALITY
High
INTEGRITY
None
AVAILABILITY
None
EXPLOIT CODE MATURITY
Proof-of-Concept
REMEDIATION LEVEL
Official Fix
REPORT CONFIDENCE
Confirmed
Temporal Score: 4.8
EPSS Score
0.02079
probability of exploitation in the next 30 days
0.79834 percentile - updated 2026-08-14
View on FIRST.org
Affected Products
3 affected products
| Product | KB Article | Severity | Impact | Restart Required |
|---|---|---|---|---|
| Microsoft SharePoint Enterprise Server 2016 | 5001917 (Security Update) |
Important | Information Disclosure | Maybe |
| Microsoft SharePoint Foundation 2013 Service Pack 1 | 5001935 (Security Update) |
Important | Information Disclosure | Maybe |
| Microsoft SharePoint Server 2019 | 5001916 (Security Update) |
Important | Information Disclosure | Maybe |
Patches
3 patches
| Article | Type | Restart |
|---|---|---|
5001917 |
Security Update | Maybe |
5001935 |
Security Update | Maybe |
5001916 |
Security Update | Maybe |
Exploits & PoC
No public exploit or PoC has been linked for this CVE yet. When available, references are sourced from public repositories and may be unverified or non-functional — review carefully before use.
Detection Rules
No public Sigma or Nuclei detection rule has been mapped to this CVE yet. Coverage is concentrated on exploited / high-profile vulnerabilities; check SigmaHQ for updates.
Acknowledgments
References
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