CVE-2026-21718

CRITICAL EPSS 34.3%
Published Feb 27, 20264mo ago · Modified Jun 17, 20261w ago
9.8 CVSS 3.1
Critical
Find Similar
Published Feb 27, 2026 4mo ago
Last Modified Jun 17, 2026 1w ago

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.

CVSS Details

Base Score
9.8
Exploitability
3.9
Impact
5.9
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality High
Integrity High
Availability High

Threat Intelligence

EPSS Exploit Probability
34.3% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available

Weaknesses 1

CWE-327

Affected Products 6

VendorProductVersionRange
copelandxweb_300d_pro_firmware* ≤1.12.1
copelandxweb_300d_pro*any
copelandxweb_500d_pro_firmware* ≤1.12.1
copelandxweb_500d_pro*any
copelandxweb_500b_pro_firmware* ≤1.12.1
copelandxweb_500b_pro*any

References 3

  • github.com https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-057-10.json
    Third Party Advisory
  • webapps.copeland.com https://webapps.copeland.com/Dixell/Pages/SystemSoftwareUpdate
    Product
  • cisa.gov https://www.cisa.gov/news-events/ics-advisories/icsa-26-057-10
    Third Party AdvisoryUS Government Resource

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.