High SEVERITY — Vulnerability

CVE-2026-62800 — Heap-based buffer overflow in Windows SMB Server allows an authorized attacker to execute code over a network.

Heap-based buffer overflow in Windows SMB Server allows an authorized attacker to execute code over a network.

Platform
Windows Server
CVE Record
CVE-2026-62800
CVSS Score
8.8/10
Published
11 August 2026
Views
26
Primary source: Review the official advisory at nvd.nist.gov Go to Source

Summary

Heap-based buffer overflow in Windows SMB Server allows an authorized attacker to execute code over a network.

Assessment

  • CVE: CVE-2026-62800
  • CVSS base score: 8.8
  • Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
  • Source: NVD record

References

Action

  • Verify affected systems against your inventory
  • Apply the vendor patch during a maintenance window
  • Restrict access at the network layer until patched
windows 10 1607 * windows 10 1809 * windows 10 21h2 * windows 10 22h2 * windows 11 23h2 * windows 11 24h2 * windows 11 25h2 * windows 11 26h1 * windows server 2012 - windows server 2012 r2 windows server 2016 * windows server 2019 *

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