CVE-2022-33138
Last modified
CVE-2022-33138 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. 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. EPSS estimates a 1.15% chance of exploitation in the next 30 days.
Description
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.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Siemens | Simatic Mv540 H Firmware | < 3.3 |
| Siemens | Simatic Mv540 S Firmware | < 3.3 |
| Siemens | Simatic Mv550 H Firmware | < 3.3 |
| Siemens | Simatic Mv550 S Firmware | < 3.3 |
| Siemens | Simatic Mv560 U Firmware | < 3.3 |
| Siemens | Simatic Mv560 X Firmware | < 3.3 |
References
- https://cert-portal.siemens.com/productcert/pdf/ssa-348662.pdfPatch, Vendor Advisory
- https://cert-portal.siemens.com/productcert/pdf/ssa-348662.pdfPatch, Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
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How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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