CVE-2021-25668
9.8 · CRITICALOverview
CVE-2021-25668 is a critical-severity vulnerability affecting siemens scalance_x200-4p_irt_firmware. It was published on April 22, 2021 and has a CVSS 3.1 base score of 9.8 (CRITICAL).
This vulnerability has a CVSS 3.1 base score of 9.8, rated CRITICAL. 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 SCALANCE X200-4P IRT (All versions < 5.5.1), SCALANCE X201-3P IRT (All versions < 5.5.1), SCALANCE X201-3P IRT PRO (All versions < 5.5.1), SCALANCE X202-2 IRT (All versions < 5.5.1), SCALANCE X202-2P IRT (incl. SIPLUS NET variant) (All versions < 5.5.1), SCALANCE X202-2P IRT PRO (All versions < 5.5.1), SCALANCE X204 IRT (All versions < 5.5.1), SCALANCE X204 IRT PRO (All versions < 5.5.1), SCALANCE X204-2 (incl. SIPLUS NET variant) (All versions < V5.2.5), SCALANCE X204-2FM (All versions < V5.2.5), SCALANCE X204-2LD (incl. SIPLUS NET variant) (All versions < V5.2.5), SCALANCE X204-2LD TS (All versions < V5.2.5), SCALANCE X204-2TS (All versions < V5.2.5), SCALANCE X206-1 (All versions < V5.2.5), SCALANCE X206-1LD (All versions < V5.2.5), SCALANCE X208 (incl. SIPLUS NET variant) (All versions < V5.2.5), SCALANCE X208PRO (All versions < V5.2.5), SCALANCE X212-2 (incl. SIPLUS NET variant) (All versions < V5.2.5), SCALANCE X212-2LD (All versions < V5.2.
Remediation
Check the references section for vendor advisories and patches from siemens. Update scalance_x200-4p_irt_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 | scalance_x200-4p_irt_firmware | >= 0, < 5.5.1 | Affected |
| siemens | scalance_x201-3p_irt_firmware | >= 0, < 5.5.1 | Affected |
| siemens | scalance_x201-3p_irt_pro_firmware | >= 0, < 5.5.1 | Affected |
| siemens | scalance_x202-2_irt_firmware | >= 0, < 5.5.1 | Affected |
| siemens | scalance_x202-2p_irt_pro_firmware | >= 0, < 5.5.1 | Affected |
| siemens | scalance_x204_irt_firmware | >= 0, < 5.5.1 | Affected |
| siemens | scalance_x204_irt_pro_firmware | >= 0, < 5.5.1 | Affected |
| siemens | scalance_x204-2_firmware | >= 0, < 5.2.5 | Affected |
| siemens | scalance_x204-2fm_firmware | >= 0, < 5.2.5 | Affected |
| siemens | scalance_x204-2ld_firmware | >= 0, < 5.2.5 | Affected |
Frequently Asked Questions
What is CVE-2021-25668?
CVE-2021-25668 is a critical-severity vulnerability affecting siemens scalance_x200-4p_irt_firmware. It was published on April 22, 2021 and has a CVSS 3.1 base score of 9.8 (CRITICAL).
How severe is CVE-2021-25668?
This vulnerability has a CVSS 3.1 base score of 9.8, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
How do I fix or remediate CVE-2021-25668?
Check the references section for vendor advisories and patches from siemens. Update scalance_x200-4p_irt_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-2021-25668?
CyberStrike's AI-powered security agents can automatically detect CVE-2021-25668 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.
AI-driven PR review catches vulnerable dependencies before they ship.
Browser-based exploitation validates findings with real proof-of-concept.
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