CVE-2026-78524: CWE-787: Out-of-bounds Write in Microsoft Microsoft 365 Apps for Enterprise
CVE-2026-78524 is a high-severity out-of-bounds write vulnerability in Microsoft 365 Apps for Enterprise that allows an unauthorized attacker to execute code remotely over a network. The vulnerability is identified as CWE-787 and affects version 16.0.1 of the product. An official fix is available from Microsoft, and the vendor manages remediation for this cloud-hosted service. There are no known exploits in the wild at this time.
AI Analysis
Technical Summary
This vulnerability involves an out-of-bounds write in Microsoft 365 Apps for Enterprise (version 16.0.1), which could allow an attacker to execute arbitrary code remotely without privileges and with low attack complexity. The CVSS 3.1 base score is 8.8, indicating high impact on confidentiality, integrity, and availability. Microsoft has published an official fix and manages remediation for this cloud service. The vulnerability is tracked as CVE-2026-78524 and classified under CWE-787.
Potential Impact
Successful exploitation could lead to remote code execution by an unauthorized attacker, resulting in full compromise of confidentiality, integrity, and availability of the affected system. This could allow attackers to run arbitrary code remotely on the targeted Microsoft 365 Apps for Enterprise environment.
Mitigation Recommendations
An official fix is available from Microsoft. Since this is a cloud-hosted service, Microsoft manages remediation server-side. Users and administrators should ensure that their Microsoft 365 Apps for Enterprise environment is updated according to Microsoft's guidance at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-78524.
CVE-2026-78524: CWE-787: Out-of-bounds Write in Microsoft Microsoft 365 Apps for Enterprise
Description
CVE-2026-78524 is a high-severity out-of-bounds write vulnerability in Microsoft 365 Apps for Enterprise that allows an unauthorized attacker to execute code remotely over a network. The vulnerability is identified as CWE-787 and affects version 16.0.1 of the product. An official fix is available from Microsoft, and the vendor manages remediation for this cloud-hosted service. There are no known exploits in the wild at this time.
CVSS v3.1
Score 8.8high
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability involves an out-of-bounds write in Microsoft 365 Apps for Enterprise (version 16.0.1), which could allow an attacker to execute arbitrary code remotely without privileges and with low attack complexity. The CVSS 3.1 base score is 8.8, indicating high impact on confidentiality, integrity, and availability. Microsoft has published an official fix and manages remediation for this cloud service. The vulnerability is tracked as CVE-2026-78524 and classified under CWE-787.
Potential Impact
Successful exploitation could lead to remote code execution by an unauthorized attacker, resulting in full compromise of confidentiality, integrity, and availability of the affected system. This could allow attackers to run arbitrary code remotely on the targeted Microsoft 365 Apps for Enterprise environment.
Mitigation Recommendations
An official fix is available from Microsoft. Since this is a cloud-hosted service, Microsoft manages remediation server-side. Users and administrators should ensure that their Microsoft 365 Apps for Enterprise environment is updated according to Microsoft's guidance at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-78524.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-08-24T17:28:00.623Z
- 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-2026-78524","vendor":"Microsoft"}]
Threat ID: 6aa04564acd9273b49faa285
Added to database: 09/08/2026, 17:27:00 UTC
Last enriched: 09/08/2026, 19:22:25 UTC
Last updated: 09/08/2026, 19:22:25 UTC
Views: 2
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