CVE-2023-29357
CriticalExploitedPublic exploitMicrosoft SharePoint Server Elevation of Privilege Vulnerability
Published Jun 14, 2023 · Updated Oct 21, 2025 · Also known as TR-23-0355
Key Facts
Patch immediately- CVE-2023-29357 is a critical-severity vulnerability (CVSS 9.8 v3.1) affecting Sharepoint Server (Microsoft), Microsoft SharePoint Server 2019.
- It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Oct 18, 2023 and is known to be used in ransomware campaigns. Public exploit code is available.
- EPSS estimates a 100% probability of exploitation in the next 30 days.
- Fixed versions are available, including Microsoft SharePoint Server 2019 16.0.10399.20005.
- Brandefense priority: patch immediately, because it is listed as exploited in the wild.
CVSS v3.1
9.8
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS (30-day exploit likelihood)
100%
Higher than 99.9% of all scored CVEs
Exploited in the wild
Yes
4 catalog listings, used by ransomware
Public exploit code
Available
Proof-of-concept or weaponized module
Get the full CVE-2023-29357 brief as a PDF
Every affected product and fixed release, exploitation status and a first 24 hours response checklist, emailed within minutes.
Description
Microsoft SharePoint Server Elevation of Privilege Vulnerability
Known-Exploited Catalog Listings
| Catalog | Added | Remediation due | Ransomware use |
|---|---|---|---|
| CISA KEV | Jan 10, 2024 | Jan 31, 2024 | Known |
| Industry KEV feed | Nov 16, 2023 | Jan 31, 2024 | Known |
| CIRCL KEV | Oct 18, 2023 | Jan 31, 2024 | Known |
| ENISA EUVD | Jan 10, 2024 | n/a | Not reported |
Required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
Affected Products
2 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| Sharepoint ServerMicrosoft | 2019 | n/a |
| Microsoft SharePoint Server 2019 | >= 16.0.0 | 16.0.10399.20005 |
Patched Releases
Microsoft SharePoint Server 2019
16.0.10399.20005
Timeline
Publicly disclosed
Jun 14, 2023
Added to CIRCL KEV
Oct 18, 2023
Added to Industry KEV feed
Nov 16, 2023
Added to CISA KEV
Jan 10, 2024
Added to ENISA EUVD
Jan 10, 2024
Last updated
Oct 21, 2025
Weakness Type
- CWE-303 Incorrect Implementation of Authentication Algorithm
References
- advisoryMicrosoft SharePoint Server Elevation of Privilege Vulnerability
- advisoryhttps://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-33129
- advisoryhttps://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2023-29357
- advisoryhttps://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2023-33129
- advisoryhttps://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2023-33130
FAQ
Common Questions.
Microsoft SharePoint Server Elevation of Privilege Vulnerability
Affected: Sharepoint Server (Microsoft) versions 2019; Microsoft SharePoint Server 2019 versions >= 16.0.0. The full list is in the CVE brief.
It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Oct 18, 2023 and is known to be used in ransomware campaigns.
Yes. It was added on Jan 10, 2024 with a federal remediation due date of Jan 31, 2024.
Public exploit code is available.
Fixed versions are available, including Microsoft SharePoint Server 2019 16.0.10399.20005.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.
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