Dashboard / CVE-2026-83999

CVE-2026-83999

HIGH
MEDIUM Priority: 0.02 BB Relevance: 29/100
Published: 2026-09-08 Modified: 2026-11-10 First seen: 2026-10-30 Status: active

Attack Surface

No Interaction Conf. Impact Integ. Impact

CVSS Vector Breakdown

AV: Local
AC: High
PR: Low
UI: None
S: Unchanged
C: High
I: High
A: High

Description

Improper link resolution before file access ('link following') in Windows Resilient File System (ReFS) Deduplication Service allows an authorized attacker to elevate privileges locally.

Weakness Classification (1)

Affected Software (15)

VendorProductVersion
Microsoft Windows 11 Version 24H2 10.0.26100.0 < 10.0.26100.9445
Microsoft Windows 11 Version 24H2 10.0.26100.0 < 10.0.26100.9445
Microsoft Windows 11 Version 24H2 10.0.26100.0 < 10.0.26100.9445
Microsoft Windows 11 Version 25H2 10.0.26200.0 < 10.0.26200.9445
Microsoft Windows 11 Version 25H2 10.0.26200.0 < 10.0.26200.9445
Microsoft Windows 11 Version 25H2 10.0.26200.0 < 10.0.26200.9445
Microsoft Windows 11 version 26H1 10.0.28000.0 < 10.0.28000.2954
Microsoft Windows 11 version 26H1 10.0.28000.0 < 10.0.28000.2954
Microsoft Windows 11 version 26H1 10.0.28000.0 < 10.0.28000.2954
Microsoft Windows Server 2025 10.0.26100.0 < 10.0.26100.33438
Microsoft Windows Server 2025 10.0.26100.0 < 10.0.26100.33438
Microsoft Windows Server 2025 10.0.26100.0 < 10.0.26100.33438
Microsoft Windows Server 2025 (Server Core installation) 10.0.26100.0 < 10.0.26100.33438
Microsoft Windows Server 2025 (Server Core installation) 10.0.26100.0 < 10.0.26100.33438
Microsoft Windows Server 2025 (Server Core installation) 10.0.26100.0 < 10.0.26100.33438

References & Advisories (1)

Bug Bounty Relevance

29 / 100
✓ No user interaction

CVSS Score

7.0 / 10.0 v3.1
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C

EPSS — Exploitation Probability

0.28%
Raw Score 0.002830
Percentile 21.1%
Date 2026-11-13

EPSS Trend

2026-11-13
0.00283
2026-11-12
0.00283
2026-11-10
0.00283
2026-11-09
0.00283
2026-11-08
0.00283
2026-11-07
0.00283
2026-11-06
0.00283
2026-11-05
0.00283
2026-11-04
0.00283
2026-11-03
0.00283
2026-11-02
0.00283
2026-11-01
0.00283
2026-10-31
0.00283
2026-10-30
0.00283

Intelligence Sources

mitre ref →

External Links