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Microsoft Windows 11 (version 24H2) Heap Buffer Overflow Exposed to Unauthenticated Network Attackers

Last refreshed2026-10-30

Status: UPDATED  |  Advisory ID: CVE-2026-83523

Key Details

CVECVE-2026-83523
CVSS Score / Version
8.8 (High) / CVSS v3.1
Updated2026-10-29
CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CVSS Prose
attack vector is network; attack complexity is low; privileges required is none; user interaction is required; scope is unchanged; confidentiality impact is high; integrity impact is high; availability impact is high.
Affected products
Microsoft Windows 11 (version 24H2), Microsoft Windows 11 (version 25H2), Microsoft Windows 11 (version 26H1), Microsoft Windows Server 2025, and Microsoft Windows 11 Version 26H2
Classified as
CWE-122 (Heap-based Buffer Overflow)
Exploitation prediction (EPSS)
0.84% probability of exploitation in the next 30 days (57% percentile) -- FIRST.org's EPSS model.

Affected Products, Subsystems & Sectors

VendorProductAffected VersionsPatch Status
MicrosoftWindows 11 (version 24H2)
MicrosoftWindows 11 (version 25H2)
MicrosoftWindows 11 (version 26H1)
MicrosoftWindows Server 2025
MicrosoftWindows 11 Version 26H2
SubsystemsOT Supporting Infrastructure
SectorsAll Sectors

What to Know

Heap-based buffer overflow in Windows Image Acquisition allows an unauthorized attacker to execute code over a network.

What to Do

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

References

SourceReference
NVDhttps://nvd.nist.gov/vuln/detail/CVE-2026-83523
CVEhttps://www.cve.org/CVERecord?id=CVE-2026-83523

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