CVE-2025-29793
Published: 08 April 2025
Summary
CVE-2025-29793 is a high-severity Deserialization of Untrusted Data (CWE-502) vulnerability in Microsoft Sharepoint Server. Its CVSS base score is 7.2 (High).
Operationally, ranked in the top 5.4% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.
Deeper analysis
CVE-2025-29793 is a deserialization of untrusted data vulnerability, tracked under CWE-502, that affects Microsoft Office SharePoint. The flaw carries a CVSS 3.1 base score of 7.2 and permits an attacker to execute arbitrary code over a network when the vulnerable component processes malicious serialized input.
An authorized attacker with high privileges can exploit the issue remotely with low attack complexity and without user interaction. Successful exploitation grants full confidentiality, integrity, and availability impact, allowing the attacker to run code on the affected SharePoint server.
The associated EPSS score rose from a low baseline after the April 2025 disclosure to a peak of 0.3599 on 2026-02-03 before receding to the current value of 0.1437, indicating a period of increased exploitation interest that later subsided. The primary vendor advisory is available at the Microsoft Security Response Center link provided in the reference.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2025-10130
Vulnerability details
Deserialization of untrusted data in Microsoft Office SharePoint allows an authorized attacker to execute code over a network.
- CWE(s)
Related Threats
No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.
Affected Assets
Mitigating Controls
Likely Mitigating Controls AI
Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.
Penetration testing supplies malicious serialized objects, detecting unsafe deserialization and supporting corrective actions.
Evaluation of untrusted data handling (deserialization testing) reveals unsafe processing, which the required remediation process addresses.
Untrusted serialized data can be deserialized and observed inside the chamber, blocking gadget-chain exploitation outside the sandbox.
Validates or rejects untrusted serialized data before deserialization occurs.
Identifies and blocks malicious code introduced through deserialization of untrusted data at system boundaries.
Integrity verification of serialized information can detect tampering before deserialization occurs.
Provenance of associated data allows detection of untrusted sources before deserialization or processing occurs.