CVE-2026-21718

critical · 10

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

0.4%

EPSS (exploit prob.)

37th

EPSS percentile

2026-02-27

Published

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

Weaknesses

CWE-327

Affected products

Vendor	Product	Affected versions
copeland	xweb_300d_pro_firmware	<= 1.12.1
copeland	xweb_300d_pro	all versions
copeland	xweb_500d_pro_firmware	<= 1.12.1
copeland	xweb_500d_pro	all versions
copeland	xweb_500b_pro_firmware	<= 1.12.1
copeland	xweb_500b_pro	all versions

Check a specific version with /api/v1/cve/match.

References

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

Query this programmatically:

curl https://evil-db.io/api/v1/cve/CVE-2026-21718