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Vulnerabilities CVE-2026-33921

CVE-2026-33921

Medium
Open
TLP:CLEAR

Npcap driver installed without administrator-only access restriction on Windows in Arc before v2.7.0

AI Analysis

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Description

The Windows installer deployed Npcap leaving its access restriction option at the insecure default value, so the driver was accessible to every local user of the host instead of being restricted to administrators only. A local user without administrative privileges could use the Npcap driver to capture the traffic reaching the host, which discloses information belonging both to the host and to other systems on the same network segment, and to send arbitrary raw packets on that segment.

Details

CVSS Score
4.8
EPSS Score
0.13%

3.2th percentile

CVSS Vector
CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N
Confidence
90%
Published
Aug 11, 2026
Last Modified
Aug 11, 2026
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