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CVE-2026-45457— Microsoft Word Remote Code Execution Vulnerability

CVSS 7.8 · High EPSS 0.08% · P24

Possible ATT&CK Techniques 1AI

T1203 · Exploitation for Client Execution

Affected Version Matrix 4

VendorProductVersion RangeStatus
MicrosoftMicrosoft 365 Apps for Enterprise16.0.1< https://aka.ms/OfficeSecurityReleasesaffected
MicrosoftMicrosoft Office 365 for Mac-affected
MicrosoftMicrosoft Office LTSC for Mac 2021-affected
MicrosoftMicrosoft Office LTSC for Mac 2024-affected
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I. Basic Information for CVE-2026-45457

Vulnerability Information
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Vulnerability Title
Microsoft Word Remote Code Execution Vulnerability
Source: NVD (National Vulnerability Database)
Vulnerability Description
Untrusted pointer dereference in Microsoft Office Word allows an unauthorized attacker to execute code locally.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
跨界内存读
Source: NVD (National Vulnerability Database)
Vulnerability Title
Microsoft Office Word 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Microsoft Office Word是美国微软（Microsoft）开源的一款文字处理软件。 Microsoft Office Word存在缓冲区错误漏洞。攻击者利用该漏洞可以远程执行代码。以下产品和版本受到影响：Microsoft Office 365 for Mac,Microsoft 365 Apps for Enterprise for 32-bit Systems,Microsoft 365 Apps for Enterprise for 64-bit Systems,Microsoft
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

VendorProductAffected VersionsCPESubscribe
MicrosoftMicrosoft 365 Apps for Enterprise 16.0.1 ~ https://aka.ms/OfficeSecurityReleases -
MicrosoftMicrosoft Office 365 for Mac - -
MicrosoftMicrosoft Office LTSC for Mac 2021 - -
MicrosoftMicrosoft Office LTSC for Mac 2024 - -

II. Public POCs for CVE-2026-45457

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III. Intelligence Information for CVE-2026-45457

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Vendor Advisories for CVE-2026-45457 (1)

Same Patch Batch · Microsoft · 2026-06-09 · 200 CVEs total

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CVE-2026-455048.8 HIGHMicrosoft Exchange Server Elevation of Privilege Vulnerability
CVE-2026-454618.4 HIGHMicrosoft Office Remote Code Execution Vulnerability
CVE-2026-454748.4 HIGHMicrosoft Office Remote Code Execution Vulnerability
CVE-2026-454638.4 HIGHMicrosoft Office Remote Code Execution Vulnerability
CVE-2026-456078.4 HIGHWindows Hyper-V Remote Code Execution Vulnerability

Showing top 20 of 200 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Microsoft 365 Apps for Enterprise
Same vendor: Microsoft
Same weakness: CWE-125

V. Comments for CVE-2026-45457

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