Auth bypass in Siemens Simatic Mv540 H
CVE-2022-33138
A vulnerability has been identified in SIMATIC MV540 H (All versions < V3.3), SIMATIC MV540 S (All versions < V3.3), SIMATIC MV550 H (All versions < V3.3), SIMATIC MV550 S (All versions < V3.3), SIMATIC MV560 U (All versions < V3.3), SIMATIC MV560 X (All versions < V3.3). Affected devices do not perform authentication for several web API endpoints. This could allow an unauthenticated remote attacker to read and download data from the device.
Vulnerability class: Broken Authentication
EPSS: 0.013 (66.9th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.
Affected products
- Siemens Simatic Mv540 H — versions All versions < V3.3
- Siemens Simatic_mv540_h
- Siemens Simatic_mv540_h_firmware
- Siemens Simatic Mv540 S — versions All versions < V3.3
- Siemens Simatic_mv540_s
- Siemens Simatic_mv540_s_firmware
- Siemens Simatic Mv550 H — versions All versions < V3.3
- Siemens Simatic_mv550_h
- Siemens Simatic_mv550_h_firmware
- Siemens Simatic Mv550 S — versions All versions < V3.3
Weakness classification (CWE)
References
- productcert@siemens.com (Patch, x_refsource_MISC, Vendor Advisory)
Frequently asked questions
- What is CVE-2022-33138?
- CVE-2022-33138 is a high-severity vulnerability in Siemens Simatic Mv540 H, classified under Missing Authentication for Critical Function. CVSS score: 7.5/10. Published 2022-07-12.
- How severe is CVE-2022-33138?
- High severity. CVSS v3 base score is 7.5 out of 10.