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Vulnerabilities

Vulnerability · CVE-2025-54897

CVE-2025-54897 is listed by Deserialization of untrusted data in Microsoft Office SharePoint allows an authorized attacker to execute code over a network..

Published Sep 9, 2025 · catalog updated Oct 18, 2026 · sharepoint server

Last checked Nov 2, 2026. A connected source was read within the last 7 days.

Check this week

CVE-2025-54897 is not in CISA KEV. FIRST estimates a 21.75% chance of exploitation in the next 30 days. Check whether you run sharepoint server.

Gaps on this record

  • No vendor fix or required action is stored. Compare the linked advisory before you change production.

Same product and reporting

Severity
High8.8
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
21.75%
Remediation
Version ranges on file
Affected products
cpe microsoft/sharepoint server

CVE-2025-54897 is listed by Deserialization of untrusted data in Microsoft Office SharePoint allows an authorized attacker to execute code over a network..

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • cpe microsoft/sharepoint server2016
  • cpe microsoft/sharepoint server2019
  • cpe microsoft/sharepoint server< 16.0.19127.20100

How to fix CVE-2025-54897

  • Upgrade

    CVE-2025-54897 lists a fix boundary at 16.0.19127.20100. Compare the installed build with that boundary before you change production.

  • Version check

    Affected < 16.0.19127.20100

  • Advisory

    Open the inventory_critical record and follow its fix.

  • Official advisories

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

CVE-2025-54897 is not in CISA KEV. FIRST estimates a 21.75% chance of exploitation in the next 30 days. Check whether you run sharepoint server.

Which versions are affected?

Compare what you have installed with microsoft/sharepoint server 2016; microsoft/sharepoint server 2019; microsoft/sharepoint server < 16.0.19127.20100. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-502: Deserialization of Untrusted Data. EPSS 21.75%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Technology hubs

Microsoft SharePoint security

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Sep 9, 2025 · Monitored products — critical

    Detected

    CVE-2025-54897 is listed by Deserialization of untrusted data in Microsoft Office SharePoint allows an authorized attacker to execute code over a network..

  2. Oct 18, 2026 · Monitored products — critical

    Updated

    CVE-2025-54897 is listed by Deserialization of untrusted data in Microsoft Office SharePoint allows an authorized attacker to execute code over a network..

Sources

References

Freshness

Last verified in this catalog Nov 2, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • Monitored products — criticalNov 2, 2026