CVE-2023-28802 | BDVDB-2026-217444 Detail

ZscalerClient Connector

Description#

An Improper Validation of Integrity Check Value in Zscaler Client Connector on Windows allows an authenticated user to disable ZIA/ZPA by interrupting the service restart from Zscaler Diagnostics. This issue affects Client Connector: before 4.2.0.149.

Impact#

CAPEC-554 Functionality Bypass

Weaknesses#

CWE-354 Improper Validation of Integrity Check Value

References#

https://help.zscaler.com/client-connector/client-connector-app-release-summary-2023?applicable_category=Windows&applicable_version=4.2

Exploit#

No public exploit known

History#

Version 12023-11-21Record published in the CVE List.
Version 22026-01-06Most recent update recorded in the CVE List.

Published

Published: 2023-11-21
Last modified: 2026-01-06

Vendor information

Vendor: Zscaler
Product: Client Connector

All Zscaler vulnerabilities

Score

4.9 Medium

EPSS

less than 1%, Very Low

Estimated chance of exploitation in the next 30 days. EPSS percentile: 13.8.

KEV

Not listed in the CISA Known Exploited Vulnerabilities catalog.

Impact

Not classified

Action

No specific action is recorded in the source data. Check the references for vendor guidance.

Affected Systems

Vulnerable
< 4.2.0.149
Fixed
4.2.0.149

Scoring System

CVSS v4.0

Not available

CVSS v3.1

4.9 Medium

CVSS:3.1/AV:P/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N

Metric breakdown
Attack Vector	Physical
Attack Complexity	Low
Privileges Required	Low
User Interaction	None
Scope	Unchanged
Confidentiality	High
Integrity	Low
Availability	None

CVSS v3.0

Not available

CVSS v2

Not available

Source: CVE List v5 (record); CISA KEV (kev, action); FIRST EPSS (epss).