CVE-2026-33921
Npcap driver installed without administrator-only access restriction on Windows in Arc before v2.7.0
- State
- Published
- Severity
- 4.8 Medium
- Published
- Aug 11, 2026
- Updated
- Aug 11, 2026
- Reserved
- Mar 24, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 4.8 Medium | 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 | Nozomi |
| 3.1 | 5.2 Medium | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N | Nozomi |
Weaknesses
- CWE-1188 Initialization of a resource with an insecure default
Affected Products
| Product | Versions |
|---|---|
ArcNozomi Networks |
|
References
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