Vulnerability · Published Oct 19, 2026 · Assigned by Netskope
CVE-2026-12254Netskope Client Captive Portal WebView Persistence allowing SWG bypass issue
Medium 6.4
In plain English
A medium-severity security flaw in Netskope Client from Netskope Inc.. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 24% of all known vulnerabilities).
Official description
Netskope is notified about a potential gap in its agent (NSClient) where a system with Netskope Client while connecting to an access point with Captive Portal switches to a Network which already has internet connectivity, the Captive Portal does not close. This allows the possibility of abuse via the Captive Portal using a rogue access point to either access malicious sites or exfiltrate data.The issue impacts all versions prior to R142
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Netskope Inc. | Netskope Client | 0 – before 142 |
Weakness: CWE-613 · Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:H/SI:H/SA:H