CVE-2021-20863
8.0 · HIGHOverview
CVE-2021-20863 is a high-severity vulnerability affecting elecom wrc-1167gst2_firmware. It was published on December 1, 2021 and has a CVSS 3.1 base score of 8.0 (HIGH).
This vulnerability has a CVSS 3.1 base score of 8.0, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.
Technical Description
OS command injection vulnerability in ELECOM routers (WRC-1167GST2 firmware v1.25 and prior, WRC-1167GST2A firmware v1.25 and prior, WRC-1167GST2H firmware v1.25 and prior, WRC-2533GS2-B firmware v1.52 and prior, WRC-2533GS2-W firmware v1.52 and prior, WRC-1750GS firmware v1.03 and prior, WRC-1750GSV firmware v2.11 and prior, WRC-1900GST firmware v1.03 and prior, WRC-2533GST firmware v1.03 and prior, WRC-2533GSTA firmware v1.03 and prior, WRC-2533GST2 firmware v1.25 and prior, WRC-2533GST2SP firmware v1.25 and prior, WRC-2533GST2-G firmware v1.25 and prior, and EDWRC-2533GST2 firmware v1.25 and prior) allows a network-adjacent authenticated attackers to execute an arbitrary OS command with the root privilege via unspecified vectors.
Remediation
Check the references section for vendor advisories and patches from elecom. Update wrc-1167gst2_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 |
|---|---|---|---|
| elecom | wrc-1167gst2_firmware | 0 | Affected |
| elecom | wrc-1167gst2a_firmware | 0 | Affected |
| elecom | wrc-1167gst2h_firmware | 0 | Affected |
| elecom | wrc-2533gs2-b_firmware | 0 | Affected |
| elecom | wrc-2533gs2-w_firmware | 0 | Affected |
| elecom | wrc-1750gs_firmware | 0 | Affected |
| elecom | wrc-1750gsv_firmware | 0 | Affected |
| elecom | wrc-1900gst_firmware | 0 | Affected |
| elecom | wrc-2533gst_firmware | 0 | Affected |
| elecom | wrc-2533gst2_firmware | 0 | Affected |
Frequently Asked Questions
What is CVE-2021-20863?
CVE-2021-20863 is a high-severity vulnerability affecting elecom wrc-1167gst2_firmware. It was published on December 1, 2021 and has a CVSS 3.1 base score of 8.0 (HIGH).
How severe is CVE-2021-20863?
This vulnerability has a CVSS 3.1 base score of 8.0, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.
How do I fix or remediate CVE-2021-20863?
Check the references section for vendor advisories and patches from elecom. Update wrc-1167gst2_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-2021-20863?
CyberStrike's AI-powered security agents can automatically detect CVE-2021-20863 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.
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