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HIGH · 7.8

CVE-2025-30388

Heap-based buffer overflow in Windows Win32K - GRFX allows an unauthorized attacker to execute code locally.

Vulnerability Description

Heap-based buffer overflow in Windows Win32K - GRFX allows an unauthorized attacker to execute code locally.

CVSS Score

7.8

HIGH

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH

Affected Products

VendorProductVersions
MicrosoftOffice< 16.0.14326.22502
MicrosoftOffice Long Term Servicing Channel2021
MicrosoftWindows 10 1507< 10.0.10240.21014
MicrosoftWindows 10 1607< 10.0.14393.8066
MicrosoftWindows 10 1809< 10.0.17763.7314
MicrosoftWindows 10 21H2< 10.0.19044.5854
MicrosoftWindows 10 22H2< 10.0.19045.5854
MicrosoftWindows 11 22H2< 10.0.22621.5335
MicrosoftWindows 11 23H2< 10.0.22631.5335
MicrosoftWindows 11 24H2< 10.0.26100.4061
MicrosoftWindows Server 2008-
MicrosoftWindows Server 2012-
MicrosoftWindows Server 2016< 10.0.14393.8066
MicrosoftWindows Server 2019< 10.0.17763.7314
MicrosoftWindows Server 2022< 10.0.20348.3692
MicrosoftWindows Server 2022 23H2< 10.0.25398.1611
MicrosoftWindows Server 2025< 10.0.26100.4061

Related Weaknesses (CWE)

CWE-122CWE-787

References

FAQ

What is CVE-2025-30388?

CVE-2025-30388 is a vulnerability with a CVSS score of 7.8 (HIGH). Heap-based buffer overflow in Windows Win32K - GRFX allows an unauthorized attacker to execute code locally.

How severe is CVE-2025-30388?

CVE-2025-30388 has been rated HIGH with a CVSS base score of 7.8/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2025-30388?

Check the references section above for vendor advisories and patch information. Affected products include: Microsoft Office, Microsoft Office Long Term Servicing Channel, Microsoft Windows 10 1507, Microsoft Windows 10 1607, Microsoft Windows 10 1809.