Critical 10.0Published Feb 26, 2026

CVE-2026-21718Copeland XWEB and XWEB Pro Use of a Broken or Risky Cryptographic Algorithm

Updated under an hour ago (Oct 28, 2026, 12:00 AM ET)

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It affects Copeland XWEB 300D PRO and 5 other products. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for Copeland XWEB 300D PRO

Exploited in the last 30 days

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: 10.0 CRITICAL (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Weakness (CWE): CWE-327
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: icscert
NVD analysis: Analyzed
Record last updated: Mar 2, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Copeland Copeland XWEB 300D PRO copeland:xweb_300d_pro (from the name)	through 1.12.1	CNA record
Copeland Copeland XWEB 500D PRO copeland:xweb_500d_pro (from the name)	through 1.12.1	CNA record
Copeland Copeland XWEB 500B PRO copeland:xweb_500b_pro (from the name)	through 1.12.1	CNA record
copeland xweb_300d_pro_firmware copeland:xweb_300d_pro_firmware	through 1.12.1	NVD
copeland xweb_500d_pro_firmware copeland:xweb_500d_pro_firmware	through 1.12.1	NVD
copeland xweb_500b_pro_firmware copeland:xweb_500b_pro_firmware	through 1.12.1	NVD

References

References

https://webapps.copeland.com/Dixell/Pages/SystemSoftwareUpdate	product
https://www.cisa.gov/news-events/ics-advisories/icsa-26-057-10	third-party-advisory, us-government-resource
https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-057-10.json	third-party-advisory

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.