CVE-2026-48560: CWE-502: Deserialization of Untrusted Data in Microsoft Microsoft SharePoint Enterprise Server 2016
Deserialization of untrusted data in Microsoft Office SharePoint allows an authorized attacker to perform spoofing over a network.
AI Analysis
Technical Summary
This vulnerability (CVE-2026-48560) affects Microsoft SharePoint Enterprise Server 2016 version 16.0.0. It arises from improper handling of deserialization of untrusted data, classified under CWE-502. Exploitation requires an attacker with authorized access and can lead to spoofing over a network. The vulnerability has been assigned a CVSS 3.1 base score of 5.4, indicating medium severity. Microsoft has published an official fix to remediate this issue, as detailed in their security update guide.
Potential Impact
An authorized attacker exploiting this vulnerability can perform spoofing attacks over a network, potentially misleading users or systems by masquerading as a trusted entity. The confidentiality and integrity impacts are limited to low, with no availability impact reported.
Mitigation Recommendations
An official fix is available from Microsoft for this vulnerability. It is recommended to apply the security update provided by Microsoft for SharePoint Enterprise Server 2016 version 16.0.0 as detailed in the vendor advisory (https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-48560).
CVE-2026-48560: CWE-502: Deserialization of Untrusted Data in Microsoft Microsoft SharePoint Enterprise Server 2016
Description
Deserialization of untrusted data in Microsoft Office SharePoint allows an authorized attacker to perform spoofing over a network.
CVSS v3.1
Score 5.4medium
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-48560) affects Microsoft SharePoint Enterprise Server 2016 version 16.0.0. It arises from improper handling of deserialization of untrusted data, classified under CWE-502. Exploitation requires an attacker with authorized access and can lead to spoofing over a network. The vulnerability has been assigned a CVSS 3.1 base score of 5.4, indicating medium severity. Microsoft has published an official fix to remediate this issue, as detailed in their security update guide.
Potential Impact
An authorized attacker exploiting this vulnerability can perform spoofing attacks over a network, potentially misleading users or systems by masquerading as a trusted entity. The confidentiality and integrity impacts are limited to low, with no availability impact reported.
Mitigation Recommendations
An official fix is available from Microsoft for this vulnerability. It is recommended to apply the security update provided by Microsoft for SharePoint Enterprise Server 2016 version 16.0.0 as detailed in the vendor advisory (https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-48560).
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-05-21T20:00:35.245Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-48560","vendor":"Microsoft"}]
Threat ID: 6a284d0f8dd33fbd85665898
Added to database: 06/09/2026, 17:27:43 UTC
Last enriched: 07/29/2026, 22:07:43 UTC
Last updated: 07/31/2026, 20:44:23 UTC
Views: 61
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
External Links
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.