CVE-2026-33921: Npcap driver installed without administrator-only access restriction on Windows in Arc before v2.7.0
Nozomi Networks · Arc
Vendor fix available · Affected: Nozomi Networks Arc · Exploitation: unlikely (under 1%)
Not in CyberSIXT coverage yet: no article names this CVE. This page shows the public record.
Higher than 2% of scored CVEs
DescriptionCVE.org
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.
Affected products1
From the CVE record. A product or version that is not listed is unknown, not unaffected.
- Nozomi Networks · Arcbefore 2.7.0
On the Atlas
Every published CVE is on the CyberSIXT Atlas, grouped by weakness, vendor and month.
- Exploitation
- Unlikely (under 1%). EPSS under 1%, or no score yet.
- CISA KEV
- Not listed
- Public check
- No public nuclei template
- Weakness
- Initialization of a Resource with an Insecure Default · Misconfiguration and Insecure Design
- Vendor
- Nozomi Networks
- Published
- August 2026
CoverageNo articles yet
No CyberSIXT article names CVE-2026-33921 yet, so there is no coverage timeline, action brief or change log for it. Everything on this page comes from the public CVE record, CISA KEV, EPSS and the nuclei template index. Search the archive or see the CVEs in the news.