AUGUST 15, 2026
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Case File

CVE-2026-33921

MEDIUM · CVSS 5.2 EPSS 0.13%

Source: NVD + CISA KEV + EPSS · Published 2026-08-11 · Last synced 2026-08-15

CyberRota Analysis

AI-Generated

The Windows installer for Npcap is vulnerable due to its default configuration allowing unrestricted access to the driver for all local users, rather than limiting it to administrators. This misconfiguration enables non-privileged users to capture network traffic and potentially send arbitrary packets, leading to information disclosure and network manipulation risks. Organizations using Npcap on Windows systems should prioritize addressing this vulnerability to mitigate potential data breaches and network security threats.

CVE
CVE-2026-33921
Severity
MEDIUM
CVSS
5.2
EPSS
0.13%
Windows

Original NVD 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.