CVE-2026-44803: CWE-190: Integer Overflow or Wraparound in Microsoft Microsoft Excel for Android
CVE-2026-44803 is a high-severity integer overflow or wraparound vulnerability in Microsoft Excel for Android. It involves a flaw in Windows Win32K - GRFX that could allow an unauthorized local attacker to execute code. An official fix is available from Microsoft to address this issue.
AI Analysis
Technical Summary
This vulnerability, tracked as CVE-2026-44803 and classified under CWE-190 (Integer Overflow or Wraparound), affects Microsoft Excel for Android. The flaw exists in the Windows Win32K - GRFX component and can be exploited by an unauthorized attacker locally to execute arbitrary code. The CVSS v3.1 base score is 7.8, indicating high severity with impacts on confidentiality, integrity, and availability. Microsoft has released an official fix for this vulnerability as detailed in their security advisory.
Potential Impact
Successful exploitation of this vulnerability could allow 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.
Mitigation Recommendations
An official fix is available from Microsoft. Users and administrators should apply the security update provided in the Microsoft 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
CVE-2026-44803 is a high-severity integer overflow or wraparound vulnerability in Microsoft Excel for Android. It involves a flaw in Windows Win32K - GRFX that could allow an unauthorized local attacker to execute code. An official fix is available from Microsoft to address this issue.
CVSS v3.1
Score 7.8high
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability, tracked as CVE-2026-44803 and classified under CWE-190 (Integer Overflow or Wraparound), affects Microsoft Excel for Android. The flaw exists in the Windows Win32K - GRFX component and can be exploited by an unauthorized attacker locally to execute arbitrary code. The CVSS v3.1 base score is 7.8, indicating high severity with impacts on confidentiality, integrity, and availability. Microsoft has released an official fix for this vulnerability as detailed in their security advisory.
Potential Impact
Successful exploitation of this vulnerability could allow 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.
Mitigation Recommendations
An official fix is available from Microsoft. Users and administrators should apply the security update provided in the Microsoft 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: 6/9/2026, 5:26:38 PM
Last enriched: 6/9/2026, 10:42:34 PM
Last updated: 6/10/2026, 5:08:27 AM
Views: 2
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