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CVE-2026-12254

Netskope Client Captive Portal WebView Persistence allowing SWG bypass issue

MEDIUM
6.4
CVSS Score
Published: October 19, 2026 at 03:37 PM UTC
Updated: October 21, 2026 at 04:31 PM UTC
1 product affected across 1 vendorNetskope Client

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Severity
MEDIUM6.4
Exploit prediction
EPSS 0.3%
SSVC
No known exploit

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

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (1)

Source: cverecord
https://www.netskope.com/resources/netskope-resources/netskope-security-advisory-nskpsa-2026-004

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

6.4MEDIUMNetskope
Vector?

Quick Info

StatusAWAITING ANALYSIS
CWE
CWE-613

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