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CVE-2026-44803: CWE-190: Integer Overflow or Wraparound in Microsoft Microsoft Excel for Android

0
High
VulnerabilityCVE-2026-44803cvecve-2026-44803cwe-190gcve
Published: 06/09/2026 (06/09/2026, 17:06:25 UTC)
Source: CVE Database V5
Vendor/Project: Microsoft
Product: Microsoft Excel for Android

Description

Integer overflow or wraparound in Windows Win32K - GRFX allows an unauthorized attacker to execute code locally.

CVSS v3.1

Score 7.8high

Attack Vector
Local
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C

Affected software

Microsoft

Microsoft Excel for Android

Affected versions
>=16.0.0.0 <16.0.20131.20024

Microsoft

Microsoft PowerPoint for Android

Affected versions
>=16.0.0.0 <16.0.20131.20024

Microsoft

Microsoft Word for Android

Affected versions
>=16.0.0.0 <16.0.20131.20024

Microsoft

Windows 10 Version 1607

Affected versions
>=10.0.14393.0 <10.0.14393.9234

Microsoft

Windows 10 Version 1809

Affected versions
>=10.0.17763.0 <10.0.17763.8880

Microsoft

Windows 10 Version 21H2

Affected versions
>=10.0.19044.0 <10.0.19044.7417

Microsoft

Windows 10 Version 22H2

Affected versions
>=10.0.19045.0 <10.0.19045.7417

Microsoft

Windows 11 version 23H2

Affected versions
>=10.0.22631.0 <10.0.22631.7219

Microsoft

Windows 11 Version 23H2

Affected versions
>=10.0.22631.0 <10.0.22631.7219

Microsoft

Windows 11 Version 24H2

Affected versions
>=10.0.26100.0 <10.0.26100.8655

Microsoft

Windows 11 Version 25H2

Affected versions
>=10.0.26200.0 <10.0.26200.8655

Microsoft

Windows 11 version 26H1

Affected versions
>=10.0.28000.0 <10.0.28000.2269

Microsoft

Windows Server 2012

Affected versions
>=6.2.9200.0 <6.2.9200.26132

Microsoft

Windows Server 2012 (Server Core installation)

Affected versions
>=6.2.9200.0 <6.2.9200.26132

Microsoft

Windows Server 2012 R2

Affected versions
>=6.3.9600.0 <6.3.9600.23228

Microsoft

Windows Server 2012 R2 (Server Core installation)

Affected versions
>=6.3.9600.0 <6.3.9600.23228

Microsoft

Windows Server 2016

Affected versions
>=10.0.14393.0 <10.0.14393.9234

Microsoft

Windows Server 2016 (Server Core installation)

Affected versions
>=10.0.14393.0 <10.0.14393.9234

Microsoft

Windows Server 2019

Affected versions
>=10.0.17763.0 <10.0.17763.8880

Microsoft

Windows Server 2019 (Server Core installation)

Affected versions
>=10.0.17763.0 <10.0.17763.8880

Microsoft

Windows Server 2022

Affected versions
>=10.0.20348.0 <10.0.20348.5256

Microsoft

Windows Server 2025

Affected versions
>=10.0.26100.0 <10.0.26100.32995

Microsoft

Windows Server 2025 (Server Core installation)

Affected versions
>=10.0.26100.0 <10.0.26100.32995

AI-Powered Analysis

Machine-generated threat intelligence

AILast updated: 08/14/2026, 13:25:34 UTC

Technical Analysis

This vulnerability involves an integer overflow or wraparound in the Windows Win32K - GRFX component affecting Microsoft Excel for Android version 16.0.0.0. Exploitation could allow an unauthorized attacker to execute arbitrary code locally. The CVSS 3.1 base score is 7.8, indicating high severity with high impact on confidentiality, integrity, and availability. Microsoft has published an official fix to address this issue.

Potential Impact

Successful exploitation can lead to local code execution by an unauthorized attacker, compromising confidentiality, integrity, and availability of the affected system. The vulnerability is rated high severity with CVSS 7.8.

Mitigation Recommendations

An official fix is available from Microsoft. Users and administrators should apply the provided patch from the Microsoft Security Response Center advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-44803 to remediate this vulnerability.

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Technical Details

Data Version
5.2
Assigner Short Name
microsoft
Date Reserved
2026-05-07T20:07:18.270Z
Cvss Version
3.1
State
PUBLISHED
Remediation Level
official-fix
Vendor Advisory Urls
[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-44803","vendor":"Microsoft"}]

Threat ID: 6a284cce8dd33fbd85664a00

Added to database: 06/09/2026, 17:26:38 UTC

Last enriched: 08/14/2026, 13:25:34 UTC

Last updated: 09/15/2026, 00:35:51 UTC

Views: 86

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