VPN and endpoint clients
CVE-2023-6340: SonicWall Capture Client version 3.7.10, NetExtender client version 10.2.337 and earlier versions are insta…
SonicWall Capture Client version 3.7.10, NetExtender client version 10.2.337 and earlier versions are installed with sfpmonitor.sys driver.
Published
ExploitedNot in CISA KEV
Ransomware useNot reportedPer CISA
SeverityMEDIUMCVSS 3.1 5.5
EPSS0.21%Chance of exploitation in 30 days
Public exploitNot tracked
FixSee advisory
Automatic summary from the vendor's CVE record. We haven't written a full analysis of this vulnerability yet.
Affected and fixed versions
| Product / branch | Fixed in |
|---|---|
| Capture Client (Windows) 3.7 | See the advisory |
| NetExtender (Windows, 64 bit, 32 bit) 10.2 | See the advisory |
Always confirm against the vendor advisory, which lists every fixed hotfix.
What it is
SonicWall Capture Client version 3.7.10, NetExtender client version 10.2.337 and earlier versions are installed with sfpmonitor.sys driver. The driver has been found to be vulnerable to Denial-of-Service (DoS) caused by Stack-based Buffer Overflow vulnerability.
Sources
KEV status, EPSS score and vendor data refreshed automatically, last on 13 Oct 2026.