Local code execution via undisclosed deserialization
Published Dec 10, 2024 · Updated Jun 9, 2026
Deserialization of untrusted data in Microsoft SharePoint Server allows local users to execute code on affected x64 servers. Microsoft identifies SharePoint deserialization handling as the weakness but has not published the entry point, serialized object format, or unsafe operation. Exploitation requires local access, no prior privileges or user interaction, and high-complexity conditions; success runs attacker-controlled code in the affected server's local security context.
Summary
What happened
Deserialization of untrusted data in Microsoft SharePoint Server allows local users to execute code on affected x64 servers. Microsoft identifies SharePoint deserialization handling as the weakness but has not published the entry point, serialized object format, or unsafe operation. Exploitation requires local access, no prior privileges or user interaction, and high-complexity conditions; success runs attacker-controlled code in the affected server's local security context.
The record
- CVE
- CVE-2024-49070
- Published
- Dec 10, 2024
- Updated
- Jun 9, 2026
- Vendor
- Microsoft
- Product
- Microsoft SharePoint Enterprise Server 2016
- Classifications
- CWE-502
- Attack vector
- local
- Privileges
- unauthenticated
Timeline
How it unfolded
- Dec 10, 2024CVE 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 <16.0.5478.1000
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.
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Technologies
Your stack
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Your stack
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