CVE-2026-21718

Copeland XWEB and XWEB Pro Use of a Broken or Risky Cryptographic Algorithm

Published Feb 27, 2026 CVSS 3.1 · 10 Critical EPSS < 1% KEV · Not listed
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

Vendor Solution

Copeland has provided a fix for the vulnerabilities and recommends users update the XWEB Pro to the latest version by going to their software update page https://webapps.copeland.com/Dixell/Pages/SystemSoftwareUpdate in the sections dedicated to the different XWEBPRO models page.

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Copeland xweb 300d Pro
Copeland xweb 300d Pro Firmware
Copeland xweb 500b Pro
Copeland xweb 500b Pro Firmware
Copeland xweb 500d Pro
Copeland xweb 500d Pro Firmware
Weaknesses NVD-CWE-noinfo
CPEs cpe:2.3:h:copeland:xweb_300d_pro:-:*:*:*:*:*:*:*
cpe:2.3:h:copeland:xweb_500b_pro:-:*:*:*:*:*:*:*
cpe:2.3:h:copeland:xweb_500d_pro:-:*:*:*:*:*:*:*
cpe:2.3:o:copeland:xweb_300d_pro_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:copeland:xweb_500b_pro_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:copeland:xweb_500d_pro_firmware:*:*:*:*:*:*:*:*
Vendors & Products Copeland xweb 300d Pro
Copeland xweb 300d Pro Firmware
Copeland xweb 500b Pro
Copeland xweb 500b Pro Firmware
Copeland xweb 500d Pro
Copeland xweb 500d Pro Firmware
Type Values Removed Values Added
First Time appeared Copeland
Copeland copeland Xweb 300d Pro
Copeland copeland Xweb 500b Pro
Copeland copeland Xweb 500d Pro
Vendors & Products Copeland
Copeland copeland Xweb 300d Pro
Copeland copeland Xweb 500b Pro
Copeland copeland Xweb 500d Pro
Type Values Removed Values Added
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.
Title Copeland XWEB and XWEB Pro Use of a Broken or Risky Cryptographic Algorithm
Weaknesses CWE-327
References
Metrics cvssV3_1

{'score': 10, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H'}