CVE-2026-83728CWE-1286

CVE-2026-83728

High · published October 13, 2026

CVSS v3.1
8.8
EPSS
0%
Percentile
14.9
In the wild
Unconfirmed
What it is

Improper validation of syntactic correctness of input in Windows Hyper-V allows an authorized attacker to perform spoofing locally.

The record
Technical detail
CVSS v3.1
8.8 · HIGH
Vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00245 · 14.9th percentile
Weakness
CWE-1286 · Improper Validation of Syntactic Correctness of Input
Published
2026-10-13T23:20Z
References (1)
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-83728 · [email protected]
EPSS history
Timeline
  • 15 OCT 03:34Z
    EPSS moved — → 0%
    epss
  • 13 OCT 19:00Z
    Windows Hyper-V Spoofing Vulnerability
    cvelistv5
  • 13 OCT 19:00Z
    Windows Hyper-V Spoofing Vulnerability
    cvelistv5