High severity · published Jun 9, 2026
CVE-2026-47635
Microsoft Outlook and Word Remote Code Execution Vulnerability
8.4
CVSS
0.3%
EPSS
No
On KEV
Description
Heap-based buffer overflow in Microsoft Office allows an unauthorized attacker to execute code locally.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Local
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 27% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
MO
Microsoft Office LTSC 2024 · Microsoft
16.0.0 before https://aka.ms/OfficeSecurityReleases · source: vendor
O2
Office 2024 · Microsoft
All versions, or not specified · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-47635
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-47635
Vendor Advisory
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-47635
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