CVE-2026-44821: CWE-125: Out-of-bounds Read in Microsoft Microsoft 365 Apps for Enterprise
CVE-2026-44821 is an out-of-bounds read vulnerability in Microsoft 365 Apps for Enterprise that allows an unauthorized local attacker to disclose information. The vulnerability has a medium severity with a CVSS score of 5. 5. An official fix is available from Microsoft. The vulnerability affects version 16. 0. 1 of the product. The vendor manages remediation for this cloud-hosted service, and users should apply the official fix as advised.
AI Analysis
Technical Summary
This vulnerability (CVE-2026-44821) involves an out-of-bounds read in Microsoft 365 Apps for Enterprise, which can be exploited by an unauthorized attacker locally to disclose sensitive information. The CVSS vector indicates local attack vector with low complexity, no privileges required, and user interaction needed. The impact is confidentiality loss without integrity or availability impact. Microsoft has published an official fix and manages remediation for this cloud service.
Potential Impact
An unauthorized local attacker can exploit this out-of-bounds read vulnerability to disclose sensitive information. There is no impact on integrity or availability. The confidentiality impact is high according to the CVSS vector.
Mitigation Recommendations
An official fix is available from Microsoft. Since this is a cloud-hosted service, Microsoft manages the remediation server-side. Users should ensure their Microsoft 365 Apps for Enterprise environment is updated according to the vendor advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-44821.
CVE-2026-44821: CWE-125: Out-of-bounds Read in Microsoft Microsoft 365 Apps for Enterprise
Description
CVE-2026-44821 is an out-of-bounds read vulnerability in Microsoft 365 Apps for Enterprise that allows an unauthorized local attacker to disclose information. The vulnerability has a medium severity with a CVSS score of 5. 5. An official fix is available from Microsoft. The vulnerability affects version 16. 0. 1 of the product. The vendor manages remediation for this cloud-hosted service, and users should apply the official fix as advised.
CVSS v3.1
Score 5.5medium
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-44821) involves an out-of-bounds read in Microsoft 365 Apps for Enterprise, which can be exploited by an unauthorized attacker locally to disclose sensitive information. The CVSS vector indicates local attack vector with low complexity, no privileges required, and user interaction needed. The impact is confidentiality loss without integrity or availability impact. Microsoft has published an official fix and manages remediation for this cloud service.
Potential Impact
An unauthorized local attacker can exploit this out-of-bounds read vulnerability to disclose sensitive information. There is no impact on integrity or availability. The confidentiality impact is high according to the CVSS vector.
Mitigation Recommendations
An official fix is available from Microsoft. Since this is a cloud-hosted service, Microsoft manages the remediation server-side. Users should ensure their Microsoft 365 Apps for Enterprise environment is updated according to the vendor advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-44821.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-05-07T20:07:18.272Z
- 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-2026-44821","vendor":"Microsoft"}]
Threat ID: 6a284cd18dd33fbd85664a9f
Added to database: 6/9/2026, 5:26:41 PM
Last enriched: 6/9/2026, 10:28:24 PM
Last updated: 6/10/2026, 4:56:27 AM
Views: 3
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