CVE-2026-45460: CWE-126: Buffer Over-read in Microsoft Microsoft 365 Apps for Enterprise
CVE-2026-45460 is a medium severity buffer over-read vulnerability in Microsoft 365 Apps for Enterprise (version 16. 0. 1). It allows an unauthorized local attacker to disclose information due to an out-of-bounds read in Microsoft Office components. An official fix is available from Microsoft, and the vulnerability affects the cloud service version of the product.
AI Analysis
Technical Summary
This vulnerability (CVE-2026-45460) involves an out-of-bounds read (CWE-126) in Microsoft 365 Apps for Enterprise, specifically version 16.0.1. The flaw allows an unauthorized attacker with local access to read memory beyond intended boundaries, potentially disclosing sensitive information. The vulnerability has a CVSS 3.1 base score of 4.7, indicating medium severity, with attack vector local, high attack complexity, no privileges required, and user interaction required. Microsoft has published an official fix and manages remediation for this cloud-hosted service.
Potential Impact
An unauthorized attacker with local access and user interaction can exploit this vulnerability to disclose sensitive information from memory. 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-hosted service, Microsoft manages the remediation server-side. Users and administrators should refer to the Microsoft Security Response Center advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45460 for update and patch deployment instructions to ensure the vulnerability is addressed.
CVE-2026-45460: CWE-126: Buffer Over-read in Microsoft Microsoft 365 Apps for Enterprise
Description
CVE-2026-45460 is a medium severity buffer over-read vulnerability in Microsoft 365 Apps for Enterprise (version 16. 0. 1). It allows an unauthorized local attacker to disclose information due to an out-of-bounds read in Microsoft Office components. An official fix is available from Microsoft, and the vulnerability affects the cloud service version of the product.
CVSS v3.1
Score 4.7medium
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-45460) involves an out-of-bounds read (CWE-126) in Microsoft 365 Apps for Enterprise, specifically version 16.0.1. The flaw allows an unauthorized attacker with local access to read memory beyond intended boundaries, potentially disclosing sensitive information. The vulnerability has a CVSS 3.1 base score of 4.7, indicating medium severity, with attack vector local, high attack complexity, no privileges required, and user interaction required. Microsoft has published an official fix and manages remediation for this cloud-hosted service.
Potential Impact
An unauthorized attacker with local access and user interaction can exploit this vulnerability to disclose sensitive information from memory. 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-hosted service, Microsoft manages the remediation server-side. Users and administrators should refer to the Microsoft Security Response Center advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45460 for update and patch deployment instructions to ensure the vulnerability is addressed.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-05-12T16:06:43.097Z
- 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-2026-45460","vendor":"Microsoft"}]
Threat ID: 6a284cd78dd33fbd85664c0d
Added to database: 6/9/2026, 5:26:47 PM
Last enriched: 6/9/2026, 10:27:37 PM
Last updated: 6/10/2026, 5:07:12 AM
Views: 2
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
External Links
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.