CVE-2026-70323: CWE-20: Improper Input Validation in Microsoft Microsoft 365 Apps for Enterprise
Improper input validation in Microsoft Office allows an unauthorized attacker to disclose information locally.
AI Analysis
Technical Summary
This vulnerability (CVE-2026-70323) involves improper input validation in Microsoft Office within Microsoft 365 Apps for Enterprise. An attacker without privileges can trigger this flaw to disclose information locally. The CVSS 3.1 base score is 5.5, reflecting a medium impact primarily on confidentiality. The vulnerability affects version 16.0.1. Microsoft has published an official fix and manages remediation for this cloud service, as detailed in their advisory.
Potential Impact
An unauthorized attacker can exploit this vulnerability to disclose sensitive information locally on affected systems. There is no impact on integrity or availability. No known active exploitation has been reported.
Mitigation Recommendations
An official fix is available from Microsoft. Since this is a cloud-hosted service, Microsoft manages remediation server-side. Users should ensure their Microsoft 365 Apps for Enterprise are updated to the fixed version as per the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-70323.
CVE-2026-70323: CWE-20: Improper Input Validation in Microsoft Microsoft 365 Apps for Enterprise
Description
Improper input validation in Microsoft Office allows an unauthorized attacker to disclose information locally.
CVSS v3.1
Score 5.5medium
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-70323) involves improper input validation in Microsoft Office within Microsoft 365 Apps for Enterprise. An attacker without privileges can trigger this flaw to disclose information locally. The CVSS 3.1 base score is 5.5, reflecting a medium impact primarily on confidentiality. The vulnerability affects version 16.0.1. Microsoft has published an official fix and manages remediation for this cloud service, as detailed in their advisory.
Potential Impact
An unauthorized attacker can exploit this vulnerability to disclose sensitive information locally on affected systems. There is no impact on integrity or availability. No known active exploitation has been reported.
Mitigation Recommendations
An official fix is available from Microsoft. Since this is a cloud-hosted service, Microsoft manages remediation server-side. Users should ensure their Microsoft 365 Apps for Enterprise are updated to the fixed version as per the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-70323.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-08-04T00:01:20.934Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Is Cloud Service
- true
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-70323","vendor":"Microsoft"}]
Threat ID: 6a7b583fbf8831d5391567ae
Added to database: 08/11/2026, 17:13:35 UTC
Last enriched: 08/11/2026, 17:42:34 UTC
Last updated: 08/12/2026, 00:12:10 UTC
Views: 2
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