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CVE-2026-83518

Last refreshed2026-10-15

Status: UPDATED  |  Advisory ID: CVE-2026-83518

Key Details

CVECVE-2026-83518
CVSS Score / Version
7.8 (High) / CVSS v3.1
Updated2026-10-13
CVSS Vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS Prose
attack vector is local; attack complexity is low; privileges required is low; user interaction is none; scope is unchanged; confidentiality impact is high; integrity impact is high; availability impact is high.
Affected products
Microsoft Windows 11 (version 23H2), Microsoft Windows 11 (version 24H2), Microsoft Windows 11 (version 25H2), and Microsoft Windows 11 (version 26H1)
Classified as
CWE-122 (Heap-based Buffer Overflow)

Affected Products, Subsystems & Sectors

VendorProductAffected VersionsPatch Status
MicrosoftWindows 11 (version 23H2)
MicrosoftWindows 11 (version 24H2)
MicrosoftWindows 11 (version 25H2)
MicrosoftWindows 11 (version 26H1)
SubsystemsOT Supporting Infrastructure
SectorsAll Sectors

What to Know

Heap-based buffer overflow in RPC Runtime allows an authorized attacker to elevate privileges locally.

What to Do

Monitor Microsoft's web page for any future patch releases.

References

SourceReference
NVDhttps://nvd.nist.gov/vuln/detail/CVE-2026-83518
CVEhttps://www.cve.org/CVERecord?id=CVE-2026-83518

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