CVE-2026-70105: CWE-20: Improper Input Validation in Microsoft Microsoft 365 Apps for Enterprise
Improper input validation in Microsoft Office Word allows an unauthorized attacker to disclose information over a network.
AI Analysis
Technical Summary
This vulnerability, tracked as CVE-2026-70105 and classified under CWE-20 (Improper Input Validation), affects Microsoft Office Word within Microsoft 365 Apps for Enterprise version 16.0.1. The flaw allows an attacker without privileges to cause information disclosure over a network by exploiting improper input validation. The CVSS 3.1 base score is 6.5, indicating a medium severity with high confidentiality impact but no integrity or availability impact. Microsoft has issued an official fix and manages remediation for this cloud-hosted service.
Potential Impact
An unauthorized attacker can exploit this vulnerability to disclose sensitive information over a network. The impact is limited to confidentiality loss; integrity and availability are not affected. There are no known exploits in the wild at this time.
Mitigation Recommendations
An official fix is available from Microsoft. Since this is a cloud service, Microsoft manages the remediation server-side. Users and administrators should consult the Microsoft Security Response Center advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-70105 for update and patch deployment guidance.
CVE-2026-70105: CWE-20: Improper Input Validation in Microsoft Microsoft 365 Apps for Enterprise
Description
Improper input validation in Microsoft Office Word allows an unauthorized attacker to disclose information over a network.
CVSS v3.1
Score 6.5medium
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability, tracked as CVE-2026-70105 and classified under CWE-20 (Improper Input Validation), affects Microsoft Office Word within Microsoft 365 Apps for Enterprise version 16.0.1. The flaw allows an attacker without privileges to cause information disclosure over a network by exploiting improper input validation. The CVSS 3.1 base score is 6.5, indicating a medium severity with high confidentiality impact but no integrity or availability impact. Microsoft has issued an official fix and manages remediation for this cloud-hosted service.
Potential Impact
An unauthorized attacker can exploit this vulnerability to disclose sensitive information over a network. The impact is limited to confidentiality loss; integrity and availability are not affected. There are no known exploits in the wild at this time.
Mitigation Recommendations
An official fix is available from Microsoft. Since this is a cloud service, Microsoft manages the remediation server-side. Users and administrators should consult the Microsoft Security Response Center advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-70105 for update and patch deployment guidance.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-08-03T23:28:38.301Z
- 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-2026-70105","vendor":"Microsoft"}]
Threat ID: 6a87778cacd9273b492c5ef8
Added to database: 08/20/2026, 21:54:20 UTC
Last enriched: 08/20/2026, 22:08:41 UTC
Last updated: 08/20/2026, 23:12:12 UTC
Views: 3
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