Medium severity · published Oct 23, 2023
CVE-2021-26734
Junction Delete leading to elevation of privilege
5.5
CVSS
0.2%
EPSS
No
On KEV
Description
Zscaler Client Connector Installer on Windows before version 3.4.0.124 improperly handled directory junctions during uninstallation. A local adversary may be able to delete folders in an elevated context.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
Attack vector
Local
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
None
Integrity
High
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 5% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
CC
Client Connector · Zscaler
before 3.4.0.124 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-26734
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-26734
Release Notes
https://help.zscaler.com/zscaler-client-connector/client-connector-app-release-summary-2021
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