CVE-2021-42029

HIGH

SIMATIC STEP 7 V15, V16 < Update 5, V17 < Update 2 - Privilege Escalation via Web Server Access

Title source: llm

Description

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.

References (1)

Core 1

Core References

Patch, Vendor Advisory x_refsource_misc

https://cert-portal.siemens.com/productcert/pdf/ssa-350757.pdf

Scores

CVSS v3 7.8

EPSS 0.0004

EPSS Percentile 11.5%

Attack Vector LOCAL

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Details

CWE

CWE-284

Status published

Products (3)

siemens/simatic_step_7 16 (5 CPE variants)

siemens/simatic_step_7 17 (2 CPE variants)

siemens/simatic_step_7 15 - 16

Published Apr 12, 2022

Tracked Since Feb 18, 2026