What’s Vulnerable › Vulnerabilities
CVE-2026-97016: Microsoft Office Outlook Remote Code Execution Vulnerability
- Severity: critical (CVSS 9.8 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 1.2% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-10-13 · updated 2026-10-31
- Weakness: CWE-122
Description
Heap-based buffer overflow in Microsoft Office Outlook allows an unauthorized attacker to execute code over a network.
Affected products
- Microsoft 365 Apps: all versions
- Microsoft Office 2021: all versions
- Microsoft Office LTSC 2024: all versions
- Microsoft 365 Apps: from 16.0.1 before https://aka.ms/OfficeSecurityReleases — fixed in https://aka.ms/OfficeSecurityReleases
- Microsoft Office LTSC 2021: from 16.0.1 before 16.0.14334.20974 — fixed in 16.0.14334.20974
- Microsoft Office LTSC 2024: from 16.0.0 before 16.0.17932.21056 — fixed in 16.0.17932.21056
How to fix
Upgrade to a fixed version: Microsoft 365 Apps https://aka.ms/OfficeSecurityReleases; Microsoft Office LTSC 2021 16.0.14334.20974; Microsoft Office LTSC 2024 16.0.17932.21056. Check the vendor advisory for mitigations.
In the news
References
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