CVE-2026-45484 in the critical feed json
Microsoft SharePoint Elevation of Privilege Vulnerability
published 5mo ago modified last mo. also EUVD-2026-35581
- cvss
- 8.8
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 33.5%
- EPSS 33.5% chance of exploitation in 30 days, percentile 98%
- public exploits
- 0
- none known
Summary
Deserialization of untrusted data in Microsoft Office SharePoint allows an authorized attacker to elevate privileges over a network.
Patch / fix
- Microsoft Microsoft SharePoint Enterprise Server 2016 16.0.5556.1005
- Microsoft Microsoft SharePoint Server 2019 16.0.10417.20153
- Microsoft Microsoft SharePoint Server Subscription Edition 16.0.19725.20384
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Check with FencerCISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- total
- Assessed
- 4mo ago
Exploit prediction
33.54% chance of exploitation in the next 30 days, higher than 98% of all scored CVEs (FIRST EPSS, 2026-11-09).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 8.8 | 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 |
| CNA | 3.1 | 8.8 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
Affected products
- Microsoft Microsoft SharePoint Enterprise Server 2016
- Microsoft Microsoft SharePoint Server 2019
- Microsoft Microsoft SharePoint Server Subscription Edition
Classification
- Weakness
-
- CWE-502 Deserialization of Untrusted Data
References
-
msrc.microsoft.com
/update-guide/vulnerability/CVE-2026-45484
vendor-advisory, patch
Sources
- CVE List CVE-2026-45484
- NVD CVE-2026-45484
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