Authentication Bypass in Copeland XWEB Pro Software
CVE-2026-21718

10CRITICAL

Key Information:

Vendor

Copeland

Status
Copeland Xweb 300d Pro
Copeland Xweb 500d Pro
Copeland Xweb 500b Pro
Vendor
CVE Published:
27 February 2026

What is CVE-2026-21718?

An authentication bypass vulnerability in Copeland's XWEB Pro software allows attackers to bypass authentication requirements, resulting in pre-authenticated code execution on affected systems. This flaw poses significant security risks, enabling unauthorized users to exploit the system without needing valid credentials.

Affected Version(s)

Copeland XWEB 300D PRO 0 <= 1.12.1

Copeland XWEB 500B PRO 0 <= 1.12.1

Copeland XWEB 500D PRO 0 <= 1.12.1

References

https://webapps.copeland.com/Dixell/Pages/SystemSoftwareU...
https://www.cisa.gov/news-events/ics-advisories/icsa-26-0...
https://github.com/cisagov/CSAF/blob/develop/csaf_files/O...

CVSS V3.1

Score:
10
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Amir Zaltzman and Noam Moshe of Claroty Team82 reported this vulnerability to CISA.
.