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CVE-2026-21718

Published: Feb 27, 2026

Modified: Mar 2, 2026

PUBLISHED

CVSS v3.1

10.0

CRITICAL

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.

Vendor	Product	Versions
Copeland	Copeland XWEB 300D PRO	affected `0 - <= 1.12.1`
Copeland	Copeland XWEB 500D PRO	affected `0 - <= 1.12.1`
Copeland	Copeland XWEB 500B PRO	affected `0 - <= 1.12.1`

Weaknesses (CWE)

CVSS v3.1 Details

CVSS v3.1 Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Changed

Confidentiality

High

Integrity

High

Availability

High

References

https://webapps.copeland.com/Dixell/Pages/SystemSoftwareUpdate

https://www.cisa.gov/news-events/ics-advisories/icsa-26-057-10

https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-057-10.json

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