Dashboard / CVE-2026-83991

CVE-2026-83991

MEDIUM 2 PoCs
MEDIUM Priority: 0.02 BB Relevance: 46/100
Published: 2026-09-08 Modified: 2026-11-10 First seen: 2026-10-30 Status: active

Attack Surface

Low Complexity No Interaction Integ. Impact

CVSS Vector Breakdown

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

Description

Missing authentication for critical function in Windows Cloud Files Mini Filter Driver allows an authorized attacker to perform tampering locally.

Weakness Classification (1)

Affected Software (39)

VendorProductVersion
Microsoft Windows 10 Version 1809 10.0.17763.0 < 10.0.17763.9245
Microsoft Windows 10 Version 1809 10.0.17763.0 < 10.0.17763.9245
Microsoft Windows 10 Version 1809 10.0.17763.0 < 10.0.17763.9245
Microsoft Windows 10 Version 21H2 10.0.19044.0 < 10.0.19044.7725
Microsoft Windows 10 Version 21H2 10.0.19044.0 < 10.0.19044.7725
Microsoft Windows 10 Version 21H2 10.0.19044.0 < 10.0.19044.7725
Microsoft Windows 10 Version 22H2 10.0.19045.0 < 10.0.19045.7725
Microsoft Windows 10 Version 22H2 10.0.19045.0 < 10.0.19045.7725
Microsoft Windows 10 Version 22H2 10.0.19045.0 < 10.0.19045.7725
Microsoft Windows 11 Version 23H2 10.0.22631.0 < 10.0.22631.7582
Microsoft Windows 11 Version 23H2 10.0.22631.0 < 10.0.22631.7582
Microsoft Windows 11 Version 23H2 10.0.22631.0 < 10.0.22631.7582
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 23H2 10.0.22631.0 < 10.0.22631.7582
Microsoft Windows 11 version 23H2 10.0.22631.0 < 10.0.22631.7582
Microsoft Windows 11 version 23H2 10.0.22631.0 < 10.0.22631.7582
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 2019 10.0.17763.0 < 10.0.17763.9245
Microsoft Windows Server 2019 10.0.17763.0 < 10.0.17763.9245
Microsoft Windows Server 2019 10.0.17763.0 < 10.0.17763.9245
Microsoft Windows Server 2019 (Server Core installation) 10.0.17763.0 < 10.0.17763.9245
Microsoft Windows Server 2019 (Server Core installation) 10.0.17763.0 < 10.0.17763.9245
Microsoft Windows Server 2019 (Server Core installation) 10.0.17763.0 < 10.0.17763.9245
Showing 30 of 39 entries

References & Advisories (1)

Proof of Concept (2)

★ 18
https://github.com/karollooool/CVE-2026-83991-writeup-and-poc
nomi-sec
—
https://github.com/ZeroDayVPN/CVE-2026-83991-WriteUP-and-PoC
nomi-sec

Bug Bounty Relevance

46 / 100
✓ Low complexity
✓ No user interaction
✓ PoC available (2)

CVSS Score

5.5 / 10.0 v3.1
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N/E:U/RL:O/RC:C

EPSS — Exploitation Probability

0.30%
Raw Score 0.003020
Percentile 23.3%
Date 2026-11-13

EPSS Trend

2026-11-13
0.00302
2026-11-12
0.00302
2026-11-10
0.00302
2026-11-09
0.00302
2026-11-08
0.00302
2026-11-07
0.00302
2026-11-06
0.00302
2026-11-05
0.00302
2026-11-04
0.00302
2026-11-03
0.00302
2026-11-02
0.00302
2026-11-01
0.00302
2026-10-31
0.00302
2026-10-30
0.00302

Intelligence Sources

mitre ref →

External Links