High severity · published Mar 29, 2023
CVE-2021-41526
A vulnerability has been reported in the windows installer (MSI) built with InstallScript custom action
7.8
CVSS
0.3%
EPSS
No
On KEV
Description
A vulnerability has been reported in the windows installer (MSI) built with InstallScript custom action. This vulnerability may allow privilege escalation when invoked ‘repair’ of the MSI which has an InstallScript custom action.
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)0.3% · higher than 20% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
RI
Revenera Installshield · Flexera
before 2021; 2021; 2021 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-41526
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-41526
seclists.org
http://seclists.org/fulldisclosure/2024/Apr/24
Vendor Advisory
https://community.flexera.com/t5/InstallShield-Knowledge-Base/CVE-2021-41526-Privilege-escalation-vulnerability-during-MSI/ta-p/218137/jump-to/first-unread-message
Third Party Advisory
https://github.com/mandiant/Vulnerability-Disclosures/blob/master/MNDT-2021-0011/MNDT-2021-0011.md