CVE-2026-21718
10.0 · CRITICALOverview
CVE-2026-21718 is a critical-severity vulnerability affecting copeland xweb_300d_pro_firmware. It was published on February 27, 2026 and has a CVSS 3.1 base score of 10.0 (CRITICAL).
This vulnerability has a CVSS 3.1 base score of 10.0, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
Technical Description
An authentication bypass vulnerability exists in Copeland XWEB Pro
version 1.12.1 and prior, enabling any attackers to bypass the
authentication requirement and achieve pre-authenticated code execution
on the system.
Remediation
Check the references section for vendor advisories and patches from copeland. Update xweb_300d_pro_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 |
|---|---|---|---|
| copeland | xweb_300d_pro_firmware | 0 | Affected |
| copeland | xweb_500d_pro_firmware | 0 | Affected |
| copeland | xweb_500b_pro_firmware | 0 | Affected |
Frequently Asked Questions
What is CVE-2026-21718?
CVE-2026-21718 is a critical-severity vulnerability affecting copeland xweb_300d_pro_firmware. It was published on February 27, 2026 and has a CVSS 3.1 base score of 10.0 (CRITICAL).
How severe is CVE-2026-21718?
This vulnerability has a CVSS 3.1 base score of 10.0, 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-2026-21718?
Check the references section for vendor advisories and patches from copeland. Update xweb_300d_pro_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-2026-21718?
CyberStrike's AI-powered security agents can automatically detect CVE-2026-21718 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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