Microsoft Office SharePoint
CVE-2026-26114 — Microsoft SharePoint Server Remote Code Execution Vulnerability
Executive Summary
Deserialization of untrusted data in Microsoft Office SharePoint allows an authorized attacker to execute code over a network.
Overview
8.8
CVSS HIGH
Important
MS Severity
Not Exploited
MS Exploit Status
Less Likely
MS Exploit Likelihood
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
ATTACK VECTOR
Network
ATTACK COMPLEXITY
Low
PRIVILEGES REQUIRED
Low
USER INTERACTION
None
SCOPE
Unchanged
CONFIDENTIALITY
High
INTEGRITY
High
AVAILABILITY
High
EXPLOIT CODE MATURITY
Unproven
REMEDIATION LEVEL
Official Fix
REPORT CONFIDENCE
Confirmed
Temporal Score: 7.7
EPSS Score
0.03033
probability of exploitation in the next 30 days
0.86316 percentile - updated 2026-08-14
View on FIRST.org
Affected Products
2 affected products
| Product | KB Article | Severity | Impact | Restart Required |
|---|---|---|---|---|
| Microsoft SharePoint Enterprise Server 2016 | 5002850 (Security Update) |
Important | Remote Code Execution | Maybe |
| Microsoft SharePoint Server 2019 | 5002845 (Security Update) |
Important | Remote Code Execution | Maybe |
Patches
2 patches
| Article | Type | Restart |
|---|---|---|
5002850 |
Security Update | Maybe |
5002845 |
Security Update | Maybe |
Exploits & PoC
2 public PoCsUnverified third-party code
Public proof-of-concept repositories aggregated from PoC-in-GitHub. They are not reviewed and may be incomplete, non-functional, or malicious — inspect the code before running anything.
| Repository | Stars | Published | Description |
|---|---|---|---|
| huynambka/cve-2026-26114-poc | 23 | 2026-07-03 | |
| fazilbaig1/CVE-2026-26114-Patch | 1 | 2026-08-03 | patching N-day of CVE-2026-26114 before microsoft. where microsoft could not patch 100% in many months. but FAC security did it |
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
f7d8c52bec79e42795cf15888b85cbad
References
On This Page