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CVE-2025-53733

Microsoft Word Remote Code Execution Vulnerability

HIGH
8.4
CVSS Score
Published: August 12, 2025 at 05:10 PM UTC
Updated: June 17, 2026 at 09:38 AM UTC
11 products affected across 1 vendorOffice365 AppsOffice 2021

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Severity
HIGH8.4
Exploit prediction
EPSS 0.5%
SSVC
No known exploit

Description

Incorrect conversion between numeric types in Microsoft Office Word allows an unauthorized attacker to execute code locally.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

365 Apps· Microsoft
95%
16.0.1 ≤ v < https://aka.ms/OfficeSecurityReleases16.0.1
Affected range stops below https://aka.ms/OfficeSecurityReleases, so it looks safe — our inference, not a vendor statement
Office· Microsoft
95%
2019
Office 2019· Microsoft
95%
19.0.0 ≤ v < https://aka.ms/OfficeSecurityReleases19.0.0
Affected range stops below https://aka.ms/OfficeSecurityReleases, so it looks safe — our inference, not a vendor statement
Office 2021· Microsoft
95%
16.0.1 ≤ v < 16.100.2508101516.0.1 ≤ v < https://aka.ms/OfficeSecurityReleases16.0.1
Affected range stops below 16.100.25081015, so it looks safe — our inference, not a vendor statement
Affected range stops below https://aka.ms/OfficeSecurityReleases, so it looks safe — our inference, not a vendor statement
Office 2024· Microsoft
95%
16.0.0 ≤ v < 16.100.2508101516.0.0 ≤ v < https://aka.ms/OfficeSecurityReleases16.0.0
Affected range stops below 16.100.25081015, so it looks safe — our inference, not a vendor statement
Affected range stops below https://aka.ms/OfficeSecurityReleases, so it looks safe — our inference, not a vendor statement
Office Long Term Servicing Channel· Microsoft
95%
20212024
SharePoint Enterprise Server· Microsoft
95%
2016
SharePoint Server· Microsoft
95%
2019
Word· Microsoft
95%
16.0.1 ≤ v < 16.0.5513.100016.0.12016
Affected range stops below 16.0.5513.1000, so it looks safe — our inference, not a vendor statement
SharePoint Enterprise Server 2016· Microsoft
60%
16.0.0 ≤ v < 16.0.5513.100216.0.0
Affected range stops below 16.0.5513.1002, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (1)

Vendor AdvisoryPatch
Source: [email protected]
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-53733

SSVC — Action Prioritization

SSVCNo known exploitNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

8.4HIGHmicrosoft
Vector?

Quick Info

StatusANALYZED
CWE
CWE-681

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