01 Record
CVE-2026-33921
Npcap driver installed without administrator-only access restriction on Windows in Arc before v2.7.0
MediumPUBLISHEDCNA: Nozomi
CNA base score4.8 CVSS v4.0CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N
02 Description
Npcap driver installed without administrator-only access restriction on Windows in Arc before v2.7.0
03 Exploitation and scoring
- Exploitation
- Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.
- SSVC decision
- ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
- AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
- Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.
- EPSS probability
- 0.13% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 2.8% of scored records. A rank, not a probability.
- NVD base score
- 4.8 (CVSS v4.0), scored by the NVD independently of the CNA.
- NVD CVSS vector
- 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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
- NVD analysis status
- Awaiting Analysis. NVD last modified this record on 2026-10-23.
- Red Hat severity
- Moderate. Red Hat's rating for its own products, not a CVSS rating.
Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.
04 Metadata
- Published
- 2026-08-11 09:48Z2 MO AGO
- Last updated
- 2026-08-11 14:15Z2 MO AGO
- Reserved
- 2026-03-24
- Assigning CNA
- Nozomi
- Record state
- PUBLISHED
- Severity
- Medium (CVSS 4.8)
- CNA CVSS vector
- 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
- Weaknesses
- CWE-1188Initialization of a Resource with an Insecure DefaultBase
- Data version
- 5.2
- Document digest
- e4d3d143d7e91f7be768fb38ff3f34fb9f0f9bbd43385e22a7c3b13cabe5f870
05 Affected products
VendorProductVersionsPlatforms
06 References
- security.nozominetworks.comhttps://security.nozominetworks.com/NN-2026:14-01
07 Remediation
Upgrade Arc to v2.7.0 or later.