Vulnerability · Published Jan 13, 2026 · Assigned by microsoft
CVE-2026-20951Microsoft SharePoint Server Remote Code Execution Vulnerability
High 7.8
In plain English
A high-severity improper input validation in Microsoft SharePoint Enterprise Server 2016 from Microsoft. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.8% (higher than 57% of all known vulnerabilities).
Severity (CVSS 3.1)7.8High
Exploit odds (30 days)0.8%top 43.4% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
Improper input validation in Microsoft Office SharePoint allows an unauthorized attacker to execute code locally.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Microsoft | Microsoft SharePoint Enterprise Server 2016 | 16.0.0 – before 16.0.5535.1001 |
| Microsoft | Microsoft SharePoint Server 2019 | 16.0.0 – before 16.0.10417.20083 |
| Microsoft | Microsoft SharePoint Server Subscription Edition | 16.0.0 – before 16.0.19127.20442 |
Weakness: CWE-20 · Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
References
- Microsoft SharePoint Server Remote Code Execution Vulnerability vendor-advisory, patch