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Vulnerability record · CVE-2026-44812 · published 9 June 2026

CVE-2026-44812: Microsoft excel integer overflow vulnerability

Microsoft · Excel

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

7.8 CVSS 3.1 High EPSS 0.47% · top 62.1% CWE-190 · Integer overflow
7.8CVSS 3.1 base score
0.47%EPSS exploitation probability, 30 days
NoNot in CISA KEV
16Affected product versions listed by NVD
1References
23 Jul 2026Last modified by NVD

Description

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

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Affected products

16 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-44812 Vendor Advisory

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Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2026-44812), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.