Authenticated tampering over network
Published Aug 11, 2026 · Updated Aug 25, 2026
Incorrect authorization in Microsoft SharePoint Server allows remote authenticated users to tamper with data over a network. Microsoft has disclosed only that SharePoint reaches an incorrect authorization decision; the vulnerable endpoint, feature, and trust check remain undisclosed in public records. Reachability requires valid credentials on an affected on-premises SharePoint server, and the published scoring bounds the consequence to integrity impact rather than code execution, disclosure, or service interruption.
Summary
What happened
Incorrect authorization in Microsoft SharePoint Server allows remote authenticated users to tamper with data over a network. Microsoft has disclosed only that SharePoint reaches an incorrect authorization decision; the vulnerable endpoint, feature, and trust check remain undisclosed in public records. Reachability requires valid credentials on an affected on-premises SharePoint server, and the published scoring bounds the consequence to integrity impact rather than code execution, disclosure, or service interruption.
The record
- CVE
- CVE-2026-63512
- Published
- Aug 11, 2026
- Updated
- Aug 25, 2026
- Vendor
- Unknown vendor
- Product
- Unknown product
- Classifications
- CWE-863
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Aug 11, 2026CVE publishedPublication date reported by the CVE source.
- Aug 25, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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What is affected?
Affected products and versions are unavailable in this record.
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
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Weakness, pattern, technique
Public exploit references
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Technologies
Your stack
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Your stack
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