CVE-2026-70328: CWE-125: Out-of-bounds Read in Microsoft Microsoft 365 Apps for Enterprise
Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to disclose information over a network.
AI Analysis
Technical Summary
This vulnerability (CWE-125) involves an out-of-bounds read in Microsoft Office Excel component of Microsoft 365 Apps for Enterprise. Exploitation could lead to unauthorized information disclosure over a network. The CVSS 3.1 vector indicates the attack requires no privileges and low complexity, with user interaction required. The impact is confidentiality loss without integrity or availability impact. Microsoft has published an official fix and manages remediation for this cloud service. The affected version is 16.0.1.
Potential Impact
An attacker can exploit this vulnerability to read memory outside the intended bounds, potentially disclosing sensitive information over a network. There is no impact on integrity or availability. The vulnerability requires user interaction but no privileges, making it a medium severity confidentiality issue.
Mitigation Recommendations
An official fix is available from Microsoft. Since this is a cloud-hosted service, Microsoft manages remediation server-side. Users should apply the official update as per the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-70328 to ensure protection.
CVE-2026-70328: CWE-125: Out-of-bounds Read in Microsoft Microsoft 365 Apps for Enterprise
Description
Out-of-bounds read in Microsoft Office Excel 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 (CWE-125) involves an out-of-bounds read in Microsoft Office Excel component of Microsoft 365 Apps for Enterprise. Exploitation could lead to unauthorized information disclosure over a network. The CVSS 3.1 vector indicates the attack requires no privileges and low complexity, with user interaction required. The impact is confidentiality loss without integrity or availability impact. Microsoft has published an official fix and manages remediation for this cloud service. The affected version is 16.0.1.
Potential Impact
An attacker can exploit this vulnerability to read memory outside the intended bounds, potentially disclosing sensitive information over a network. There is no impact on integrity or availability. The vulnerability requires user interaction but no privileges, making it a medium severity confidentiality issue.
Mitigation Recommendations
An official fix is available from Microsoft. Since this is a cloud-hosted service, Microsoft manages remediation server-side. Users should apply the official update as per the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-70328 to ensure protection.
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-2026-70328","vendor":"Microsoft"}]
Threat ID: 6a7b583fbf8831d5391567bd
Added to database: 08/11/2026, 17:13:35 UTC
Last enriched: 08/11/2026, 17:30:54 UTC
Last updated: 08/12/2026, 00:12:10 UTC
Views: 3
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