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 21.7%
Does this matter?
EPSS puts the probability of exploitation in the next 30 days at 21.7%, higher than 98% 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
- 21.75% probability · 98th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-502
- Affected
- microsoft/sharepoint server
- Source
- secure@microsoft.com
EPSS moved from 21.7% on 18 October 2026 to 21.7% on 1 November 2026. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”.
References
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.