EUVD-2026-77537
GHSA-4vcv-p436-xxwh
Vulnerability Assessment
| Weakness |
CWE
OWASP Top 10:2025
A05:2025 - Injection
ASVS 5.0
V2 - Validation and Business Logic Input validation, allowlisting
|
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Alert meAnalysisAIv1 – Sep 16, 2026
Improper input validation in Zscaler Client Connector for Android and ChromeOS (builds prior to 4.2.0.152) lets an attacker with elevated local privileges on the endpoint feed malformed input to the connector and bypass Zscaler's traffic inspection and access controls, with a CVSS 8.1 (AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:L) rating that reflects total loss of the security control's integrity. The flaw is not remotely exploitable and requires high privileges (root or equivalent device-admin context) on the affected Android or ChromeOS device, and there is no public exploit identified at time of analysis. EPSS is 0.12% (2nd percentile) and CISA SSVC records exploitation 'none', automatable 'no' with total technical impact — a low-likelihood, patch-promptly issue rather than an emergency.
Affected VersionsENISA
Affected Packages
Source: OSV (Open Source Vulnerabilities)
Affects your stack
Affects 2 packages in euvd
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Severity by source
AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:L
Primary rating from Vendor (Zscaler) · only source for this CVE.
CVSS VectorVendor: Zscaler
DescriptionCVE.org
An improper input validation vulnerability in Zscaler Client Connector on Android and ChromeOS allows an attacker to potentially bypass Zscaler controls.
Threat Intelligence Overview
NVD
CVE.org
EPSS
Vulnrichment
How this decision was reached
The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.
What every action level means
SSVC AssessmentENISA
Priority Score
Attack Technique
Authentication bypass attacks exploit flaws in the verification mechanisms that control access to systems and applications.
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