CVE-2026-83509CWE-426

CVE-2026-83509

High · published October 13, 2026

CVSS v3.1
7.0
EPSS
0%
Percentile
21.0
In the wild
Unconfirmed
What it is

Untrusted search path in Windows Setup Files Cleanup allows an authorized attacker to elevate privileges locally.

The record
Technical detail
CVSS v3.1
7.0 · HIGH
Vector
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00295 · 21.0th percentile
Weakness
CWE-426 · Untrusted Search Path
Published
2026-10-13T23:19Z
References (1)
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-83509 · [email protected]
EPSS history
Timeline
  • 15 OCT 03:34Z
    EPSS moved — → 0%
    epss
  • 13 OCT 19:00Z
    Windows Setup Files Cleanup Elevation of Privilege Vulnerability
    cvelistv5
  • 13 OCT 19:00Z
    Windows Setup Files Cleanup Elevation of Privilege Vulnerability
    cvelistv5