Windows ZCC Upgrade DoS And Privilege Escalation Through RPC Control

published 2024-05-02 2 y ago modified 2026-06-17 4 mo ago also EUVD-2023-46430

cvss: 5.3; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.2%; EPSS 0.2% chance of exploitation in 30 days, percentile 8%
public exploits: 0; none known

An Improper Link Resolution Before File Access ('Link Following') vulnerability in Zscaler Client Connector on Windows allows a system file to be overwritten.This issue affects Client Connector on Windows: before 3.7.

Patch / fix

fixed in 2

Zscaler Client Connector 3.7
zscaler client_connector 3.7

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: partial
Assessed: 2 y ago (2024-05-02)

Exploit prediction

0.19% chance of exploitation in the next 30 days, higher than 8% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	5.3	CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:H
NVD	3.1	7.8	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products

Zscaler Client Connector
zscaler client_connector

Classification

Weakness

CWE-59 Improper Link Resolution Before File Access

References

help.zscaler.com /zscaler-client-connector/client-connector-app-release-summary-2021??applicable_category=windows&applicable_ve
release-notes, vendor-advisory

Sources

CVE List CVE-2023-41971
NVD CVE-2023-41971

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary