CVE-2021-25666
4.3 · MEDIUMOverview
CVE-2021-25666 is a medium-severity vulnerability affecting siemens scalance_w780_firmware. It was published on February 9, 2021 and has a CVSS 3.1 base score of 4.3 (MEDIUM).
This vulnerability has a CVSS 3.1 base score of 4.3, rated MEDIUM. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.
Technical Description
A vulnerability has been identified in SCALANCE W780 and W740 (IEEE 802.11n) family (All versions < V6.3). Sending specially crafted packets through the ARP protocol to an affected device could cause a partial denial-of-service, preventing the device to operate normally for a short period of time.
Remediation
Check the references section for vendor advisories and patches from siemens. Update scalance_w780_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_w780_firmware | >= 0, < 6.3 | Affected |
| siemens | scalance_w740_firmware | >= 0, < 6.3 | Affected |
Frequently Asked Questions
What is CVE-2021-25666?
CVE-2021-25666 is a medium-severity vulnerability affecting siemens scalance_w780_firmware. It was published on February 9, 2021 and has a CVSS 3.1 base score of 4.3 (MEDIUM).
How severe is CVE-2021-25666?
This vulnerability has a CVSS 3.1 base score of 4.3, rated MEDIUM. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.
How do I fix or remediate CVE-2021-25666?
Check the references section for vendor advisories and patches from siemens. Update scalance_w780_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-2021-25666?
CyberStrike's AI-powered security agents can automatically detect CVE-2021-25666 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.
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