Vulnerability in Siemens Simatic S7-1200 CPU
CVE-2021-42029
A vulnerability has been identified in SIMATIC STEP 7 (TIA Portal) V15 (All versions), SIMATIC STEP 7 (TIA Portal) V16 (All versions < V16 Update 5), SIMATIC STEP 7 (TIA Portal) V17 (All versions < V17 Update 2). An attacker could achieve privilege escalation on the web server of certain devices due to improper access control vulnerability in the engineering system software. The attacker needs to have direct access to the impacted web server.
EPSS: 0.002 (14.9th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Siemens Simatic_s7-1200_cpu
- Siemens Simatic_s7-1200_cpu_1211c
- Siemens Simatic_s7-1200_cpu_1212c
- Siemens Simatic_s7-1200_cpu_1212fc
- Siemens Simatic_s7-1200_cpu_1214c
- Siemens Simatic_s7-1200_cpu_1214_fc
- Siemens Simatic_s7-1200_cpu_1214fc
- Siemens Simatic_s7-1200_cpu_1215c
- Siemens Simatic_s7-1200_cpu_1215_fc
- Siemens Simatic_s7-1200_cpu_1215fc
Weakness classification (CWE)
References
- productcert@siemens.com (Patch, x_refsource_MISC, Vendor Advisory)
Frequently asked questions
- What is CVE-2021-42029?
- CVE-2021-42029 is a high-severity vulnerability in Siemens Simatic S7-1200 CPU, classified under Improper Access Control. CVSS score: 7.8/10. Published 2022-04-12.
- How severe is CVE-2021-42029?
- High severity. CVSS v3 base score is 7.8 out of 10.