CVE-2021-26737

MEDIUM

Zscaler Client Connector < 3.6 - Unauthenticated Denial of Service via RPC Client Validation Race Condition

Title source: llm

Description

The Zscaler Client Connector for macOS prior to 3.6 did not sufficiently validate RPC clients. A local adversary without sufficient privileges may be able to shutdown the Zscaler tunnel by exploiting a race condition.

References (1)

Core 1

Core References

Release Notes

https://help.zscaler.com/client-connector/client-connector-app-release-summary-2022?applicable_category=macOS&applicable_version=3.6&deployment_date=2022-01-07&id=1388686

Scores

CVSS v3 5.5

EPSS 0.0011

EPSS Percentile 1.3%

Attack Vector LOCAL

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

CISA SSVC

Vulnrichment

Exploitation none

Automatable no

Technical Impact partial

Details

CWE

CWE-346

Status published

Products (1)

zscaler/client_connector < 3.6

Published Oct 23, 2023

Tracked Since Feb 18, 2026