Authenticated remote code execution
Published Jun 9, 2026 · Updated Jun 9, 2026
Path traversal in Microsoft SharePoint Server 2016, 2019, and Subscription Edition allows remote authenticated users to execute code. Microsoft has not disclosed the affected component, pathname input, or operation that permits traversal beyond its restricted directory. A low-privileged SharePoint account and network access are required; successful exploitation executes code on the server.
Summary
What happened
Path traversal in Microsoft SharePoint Server 2016, 2019, and Subscription Edition allows remote authenticated users to execute code. Microsoft has not disclosed the affected component, pathname input, or operation that permits traversal beyond its restricted directory. A low-privileged SharePoint account and network access are required; successful exploitation executes code on the server.
The record
- CVE
- CVE-2026-45454
- Published
- Jun 9, 2026
- Updated
- Jun 9, 2026
- Vendor
- Microsoft
- Product
- Microsoft SharePoint Enterprise Server 2016
- Classifications
- CWE-22, T1210
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Jun 9, 2026CVE publishedPublication date reported by the CVE source.
- Jun 9, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=16.0.0 <16.0.5556.1005
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
No public exploit references are available in this record.
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
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Your stack
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