CVE-2026-44803: CWE-190: Integer Overflow or Wraparound in Microsoft Microsoft Excel for Android
Integer overflow or wraparound in Windows Win32K - GRFX allows an unauthorized attacker to execute code locally.
AI Analysis
Technical Summary
This vulnerability (CVE-2026-44803) involves an integer overflow or wraparound in the Windows Win32K graphics component used by Microsoft Excel for Android. The flaw enables an unauthorized attacker to execute code locally by exploiting improper integer handling. The CVSS 3.1 base score is 7.8, indicating high severity with high impact on confidentiality, integrity, and availability. Microsoft has released an official fix to remediate this vulnerability.
Potential Impact
Successful exploitation allows an unauthorized local attacker to execute arbitrary code on the affected system, potentially leading to full compromise of confidentiality, integrity, and availability of the system running Microsoft Excel for Android version 16.0.0.0.
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.
CVE-2026-44803: CWE-190: Integer Overflow or Wraparound in Microsoft 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
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-44803) involves an integer overflow or wraparound in the Windows Win32K graphics component used by Microsoft Excel for Android. The flaw enables an unauthorized attacker to execute code locally by exploiting improper integer handling. The CVSS 3.1 base score is 7.8, indicating high severity with high impact on confidentiality, integrity, and availability. Microsoft has released an official fix to remediate this vulnerability.
Potential Impact
Successful exploitation allows an unauthorized local attacker to execute arbitrary code on the affected system, potentially leading to full compromise of confidentiality, integrity, and availability of the system running Microsoft Excel for Android version 16.0.0.0.
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.
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: 07/29/2026, 21:51:26 UTC
Last updated: 07/31/2026, 19:30:13 UTC
Views: 61
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