CVE-2026-55052
HIGHCVSS 8.8/10EPSS 0.54%
Last modified
CVE-2026-55052 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. Missing authorization in Microsoft Office SharePoint allows an authorized attacker to elevate privileges over a network.. EPSS estimates a 0.54% chance of exploitation in the next 30 days.
Description
Missing authorization in Microsoft Office SharePoint allows an authorized attacker to elevate privileges over a network.
Metrics
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Microsoft | Sharepoint Server | < 16.0.19725.20434 |
| Microsoft | Sharepoint Server | 2016 |
| Microsoft | Sharepoint Server | 2019 |
References
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-55052Patch, Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Analyzed
Frequently Asked Questions
What is CVE-2026-55052?
Missing authorization in Microsoft Office SharePoint allows an authorized attacker to elevate privileges over a network.
How severe is CVE-2026-55052?
CVE-2026-55052 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 0.54% probability of exploitation in the next 30 days.
How do I fix CVE-2026-55052?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- Uncovering a hidden BOLA in Appsmith's snapshot logicStrix autonomously discovered a BOLA/IDOR vulnerability in Appsmith's snapshot deletion path.
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Are you affected by CVE-2026-55052?
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Scan your code nowSource: NVD / NIST