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Vulnerabilities

Vulnerability · CVE-2026-33921

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

Published Aug 11, 2026 · Nozomi Networks

Check if you run it

No confirmed exploitation is on record for CVE-2026-33921. EPSS is 0.13%. Act only if a listed version of Nozomi Networks is installed.

Gaps on this record

  • No version range is stored. A customer cannot check an installed version against this record.
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
Medium5.2
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.13%
Remediation
Advisory link
Affected products
Nozomi Networks

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.

No affected version ranges are stored yet. Use the vendor advisory before you decide this record does not apply.

How to fix CVE-2026-33921

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2026-33921. EPSS is 0.13%. Act only if a listed version of Nozomi Networks is installed.

Which versions are affected?

Affected version ranges are not on this record. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 0.13%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Technology hubs

Windows security

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Aug 11, 2026 · CSAF Advisories

    Detected

    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.

Sources

  • CSAF AdvisoriesVendor advisoryNN-2026:14-01:CVE-2026-33921

    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.

    security.nozominetworks.com
  • CVE.orgVulnerability recordCVE-2026-33921

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-33921

    30-day exploitation probability 0.1%

    first.org

References

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.