CVE-2026-33921
Npcap driver installed without administrator-only access restriction on Windows in Arc before v2.7.0
CVSS Score
5.2
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-1188 |
| Vendor | nozomi networks |
| Product | arc |
| Published | Aug 11, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Changed
Confidentiality
Low
Integrity
Low
Availability
None
Affected Versions
Nozomi Networks / Arc
0 < 2.7.0
References
Credits
This issue was found by Stefano Balzarotti of Nozomi Networks during an internal investigation.