Improper access control in SIMATIC STEP 7 (TIA Portal) - CVE-2021-42029
Published: April 21, 2022
Vulnerability identifier: #VU62478
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:P/PR:H/UI:A/VC:N/VI:N/VA:N/SC:H/SI:L/SA:L/E:U/U:Clear
CVE-ID: CVE-2021-42029
CWE-ID: CWE-284
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: Siemens
Affected software:
SIMATIC STEP 7 (TIA Portal)
SIMATIC STEP 7 (TIA Portal)
Detailed vulnerability description
The vulnerability allows a local user to gain unauthorized access to otherwise restricted functionality.
The vulnerability exists due to improper access restrictions in the engineering system software. A local administrator can bypass implemented security restrictions and gain elevated privileges on the system.
How to mitigate CVE-2021-42029
Install updates from vendor's website.