CVE-2023-36521
8.6 · HIGHOverview
CVE-2023-36521 is a high-severity vulnerability affecting siemens simatic_mv540_h_firmware. It was published on July 11, 2023 and has a CVSS 3.1 base score of 8.6 (HIGH).
This vulnerability has a CVSS 3.1 base score of 8.6, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
Technical Description
A vulnerability has been identified in SIMATIC MV540 H (All versions < V3.3.4), SIMATIC MV540 S (All versions < V3.3.4), SIMATIC MV550 H (All versions < V3.3.4), SIMATIC MV550 S (All versions < V3.3.4), SIMATIC MV560 U (All versions < V3.3.4), SIMATIC MV560 X (All versions < V3.3.4). The result synchronization server of the affected products contains a
vulnerability that may lead to a denial of service condition. An attacker may
cause a denial of service situation of all socket-based communication of the
affected products if the result server is enabled.
Remediation
Check the references section for vendor advisories and patches from siemens. Update simatic_mv540_h_firmware to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| siemens | simatic_mv540_h_firmware | >= 0, < 3.3.4 | Affected |
| siemens | simatic_mv540_s_firmware | >= 0, < 3.3.4 | Affected |
| siemens | simatic_mv550_h_firmware | >= 0, < 3.3.4 | Affected |
| siemens | simatic_mv550_s_firmware | >= 0, < 3.3.4 | Affected |
| siemens | simatic_mv560_u_firmware | >= 0, < 3.3.4 | Affected |
| siemens | simatic_mv560_x_firmware | >= 0, < 3.3.4 | Affected |
Frequently Asked Questions
What is CVE-2023-36521?
CVE-2023-36521 is a high-severity vulnerability affecting siemens simatic_mv540_h_firmware. It was published on July 11, 2023 and has a CVSS 3.1 base score of 8.6 (HIGH).
How severe is CVE-2023-36521?
This vulnerability has a CVSS 3.1 base score of 8.6, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
How do I fix or remediate CVE-2023-36521?
Check the references section for vendor advisories and patches from siemens. Update simatic_mv540_h_firmware to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2023-36521?
CyberStrike's AI-powered security agents can automatically detect CVE-2023-36521 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
AI agents map your attack surface to find vulnerabilities like this one.
Automated penetration testing that runs continuously, not just quarterly.
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Browser-based exploitation validates findings with real proof-of-concept.
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