CVEs / CVE-2026-45484
CVE-2026-45484: Microsoft Microsoft SharePoint Enterprise Server 2016 vulnerability
- high 8.8 CVSS 3.1 (from the CNA)
- EPSS 35.2% chance of exploitation in the next 30 days, higher than 98% of CVEs (30 Oct 2026)
- Last changed at its sources
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Description
Deserialization of untrusted data in Microsoft Office SharePoint allows an authorized attacker to elevate privileges over a network.
Affected and fixed versions
| Product | Affected | Fixed in |
|---|---|---|
| Microsoft Microsoft SharePoint Enterprise Server 2016 | from 16.0.0, before 16.0.5556.1005 | 16.0.5556.1005 |
| Microsoft Microsoft SharePoint Server 2019 | from 16.0.0, before 16.0.10417.20153 | 16.0.10417.20153 |
| Microsoft Microsoft SharePoint Server Subscription Edition | from 16.0.0, before 16.0.19725.20384 | 16.0.19725.20384 |
Exploitation
Not in the CISA Known Exploited Vulnerabilities catalog as of 30 Oct 2026.
Severity
| CVSS 3.1 | 8.8 highCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HScored by the CNA ([email protected]) |
|---|---|
| Weakness | CWE-502 |
References
- CVE-2026-45484 on NVD
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45484 Vendor Advisory
Sources
Exploitation status from the CISA Known Exploited Vulnerabilities catalog. EPSS scores from FIRST. Descriptions, severity and references from the National Vulnerability Database. Open-source package versions from OSV (CC-BY 4.0). Text is shown as each source states it; Stackurity does not edit it. Check the vendor's advisory before acting.
This product uses data from the NVD API but is not endorsed or certified by the NVD.