CVE-2021-31888
8.8 · HIGHOverview
CVE-2021-31888 is a high-severity vulnerability affecting siemens nucleus_net. It was published on November 9, 2021 and has a CVSS 3.1 base score of 8.8 (HIGH).
This vulnerability has a CVSS 3.1 base score of 8.8, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.
Technical Description
A vulnerability has been identified in APOGEE MBC (PPC) (BACnet) (All versions), APOGEE MBC (PPC) (P2 Ethernet) (All versions), APOGEE MEC (PPC) (BACnet) (All versions), APOGEE MEC (PPC) (P2 Ethernet) (All versions), APOGEE PXC Compact (BACnet) (All versions < V3.5.4), APOGEE PXC Compact (P2 Ethernet) (All versions < V2.8.19), APOGEE PXC Modular (BACnet) (All versions < V3.5.4), APOGEE PXC Modular (P2 Ethernet) (All versions < V2.8.19), Desigo PXC00-E.D (All versions >= V2.3 and < V6.30.016), Desigo PXC00-U (All versions >= V2.3 and < V6.30.016), Desigo PXC001-E.D (All versions >= V2.3 and < V6.30.016), Desigo PXC100-E.D (All versions >= V2.3 and < V6.30.016), Desigo PXC12-E.D (All versions >= V2.3 and < V6.30.016), Desigo PXC128-U (All versions >= V2.3 and < V6.30.016), Desigo PXC200-E.D (All versions >= V2.3 and < V6.30.016), Desigo PXC22-E.D (All versions >= V2.3 and < V6.30.016), Desigo PXC22.1-E.D (All versions >= V2.3 and < V6.30.016), Desigo PXC36.1-E.D (All versions >= V2.3 and
Remediation
Check the references section for vendor advisories and patches from siemens. Update nucleus_net 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 | nucleus_readystart_v3 | >= 0, < 2017.02.4 | Affected |
| siemens | apogee_pxc_compact_firmware | >= 0, < 2.8.19 | Affected |
| siemens | apogee_pxc_modular_firmware | >= 0, < 2.8.19 | Affected |
| siemens | talon_tc_compact_firmware | >= 0, < 3.5.4 | Affected |
| siemens | talon_tc_modular_firmware | >= 0, < 3.5.4 | Affected |
| siemens | desigo_pxc00-e.d_firmware | >= 2.3, < 6.30.016 | Affected |
| siemens | desigo_pxc00-u_firmware | >= 2.3, < 6.30.016 | Affected |
| siemens | desigo_pxc001-e.d_firmware | >= 2.3, < 6.30.016 | Affected |
Frequently Asked Questions
What is CVE-2021-31888?
CVE-2021-31888 is a high-severity vulnerability affecting siemens nucleus_net. It was published on November 9, 2021 and has a CVSS 3.1 base score of 8.8 (HIGH).
How severe is CVE-2021-31888?
This vulnerability has a CVSS 3.1 base score of 8.8, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.
How do I fix or remediate CVE-2021-31888?
Check the references section for vendor advisories and patches from siemens. Update nucleus_net 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-2021-31888?
CyberStrike's AI-powered security agents can automatically detect CVE-2021-31888 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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