CVE-2026-64903
Integer overflow or wraparound in Microsoft Office allows an unauthorized attacker to execute code locally.
CVSS
7.8
High
EPSS
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KEV
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Exploit Today
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0-100
Published: Aug 11, 2026 · Last modified: Aug 11, 2026 · CWE-122 · CWE-190
Not enough EPSS history yet.
Integer overflow or wraparound in Microsoft Office allows an unauthorized attacker to execute code locally.
CVECVSSEPSSKEVRExploitTitleMod.
CVE-2026-730867.4 HIG—
———nanoid is a secure, URL-friendly, unique string ID generator for JavaScript. Prior to versions 3.3.12 and 5.1.11, the nanoid(size) function in index.js and index.cjs coerces the user-influenced size parameter to a signed 32-bit integer, allowing a value of 2147483648 to become -2147483648 and corrupt the process-wide CSPRNG poolOffset in fillPool(), which causes subsequent session tokens, CSRF tokens, API keys, and unique identifiers to become the deterministic string "uuuuuuuuuuuuuuuuuuuuu" until the process restarts. This issue is fixed in versions 3.3.12 and 5.1.11.6hCVE-2026-713318.1 HIG—
———Integer overflow or wraparound in Microsoft Azure Attestation service and Device Health Attestation Service allows an unauthorized attacker to execute code over a network.6hCVE-2026-703477.8 HIG—
———Heap-based buffer overflow in Windows Installer allows an authorized attacker to elevate privileges locally.6hCVE-2026-703457.8 HIG—
———Heap-based buffer overflow in Windows Installer allows an authorized attacker to elevate privileges locally.6hCVE-2026-703306.7 MED—
———Heap-based buffer overflow in Windows DNS allows an authorized attacker to elevate privileges locally.6hCVE-2026-703298.8 HIG—
———Integer overflow or wraparound in Microsoft Office Outlook allows an unauthorized attacker to execute code over a network.6h