CVE-2025-30378: Deserialization of untrusted data in Microsoft Office SharePoint allows an unauthorized attacker to execute code locally

High severity · published May 13, 2025

CVE-2025-30378

Deserialization of untrusted data in Microsoft Office SharePoint allows an unauthorized attacker to execute code locally

7.0

CVSS

1.4%

EPSS

On KEV

Description

Deserialization of untrusted data in Microsoft Office SharePoint allows an unauthorized attacker to execute code locally.

CVSS vector

CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H

Attack vector

Local

Complexity

High

Privileges

None

User interaction

Required

Confidentiality

High

Integrity

High

Availability

High

Scope

Unchanged

Exploitation

Is it being used?

Exploit prediction (EPSS)1.4% · higher than 73% of CVEs

Exploited in the wildNo evidence yet

CISA KEVNot listed

Ransomware campaign useNot known

Affected products

Which versions

SharePoint · Microsoft

before 16.0.18526.20286; 2016; 2019 · source: NVD

Affected product

SharePoint

Microsoft

All SharePoint CVEs

References

NVD

https://nvd.nist.gov/vuln/detail/CVE-2025-30378

CVE.org

https://www.cve.org/CVERecord?id=CVE-2025-30378

Vendor Advisory

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-30378