Cyber Resilience

CVE-2025-30388

HighUpdated

Published: 13 May 2025

Published
13 May 2025
Modified
22 May 2026
KEV Added
—
Patch
—
CVSS Score v3.1 7.8 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
EPSS Score 0.0079 74.3th percentile
Risk Priority 16 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2025-30388 is a high-severity Heap-based Buffer Overflow (CWE-122) vulnerability in Microsoft Office Long Term Servicing Channel. Its CVSS base score is 7.8 (High).

Operationally, ranked in the top 25.7% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.

EU & UK References

Vulnerability details

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

CWE(s)
CWE-122CWE-787

Related Threats

No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.

Affected Assets

microsoft
365 copilot
≤ 16.0.18827.20000
microsoft
office
≤ 16.0.14326.22502
microsoft
office long term servicing channel
2021, 2024
microsoft
windows 10 1507
≤ 10.0.10240.21014
microsoft
windows 10 1607
≤ 10.0.14393.8066
microsoft
windows 10 1809
≤ 10.0.17763.7314 · ≤ 10.0.17763.7314
microsoft
windows 10 21h2
≤ 10.0.19044.5854
microsoft
windows 10 22h2
≤ 10.0.19045.5854
microsoft
windows 11 22h2
≤ 10.0.22621.5335
microsoft
windows 11 23h2
≤ 10.0.22631.5335
+8 more product configuration(s) — see NVD for full list

Mitigating Controls

Likely Mitigating Controls AI

Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.

SI-16 Memory Protection
addresses: CWE-787

Out-of-bounds writes that corrupt control flow or inject shellcode are rendered non-executable by the same memory protections.

References