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UK Cyber Defence
VulnerabilityAnalyzed

CVE-2025-54897

Deserialization of untrusted data in Microsoft Office SharePoint allows an authorized attacker to execute code over a network.

HIGH 8.8EPSS 19.1%

Does this matter?

EPSS puts the probability of exploitation in the next 30 days at 19.1%, higher than 97% of all known CVEs. Patch or mitigate before the next change window.

Description

Deserialization of untrusted data in Microsoft Office SharePoint allows an authorized attacker to execute code over a network.

CVSS 3.1
8.8 HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS
19.15% probability · 97th percentile
CISA KEV
Not listed
Weakness
CWE-502
Affected
microsoft/sharepoint server
Source
secure@microsoft.com

Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.