High severity · published Oct 23, 2023
CVE-2021-26736
ZApp Installer Privilege Escalation Vulnerabilities
7.8
CVSS
0.2%
EPSS
No
On KEV
Description
Multiple vulnerabilities in the Zscaler Client Connector Installer and Uninstaller for Windows prior to 3.6 allowed execution of binaries from a low privileged path. A local adversary may be able to execute code with SYSTEM privileges.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack vector
Local
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 13% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
CC
Client Connector · Zscaler
before 3.6 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-26736
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-26736
Release Notes
https://help.zscaler.com/zscaler-client-connector/client-connector-app-release-summary-2021
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