Critical severity10.0NVD Advisory· Published Feb 27, 2026· Updated Jun 17, 2026

CVE-2026-21718

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.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

Copeland/Copeland XWEB 300D PROv5
Range: 0
Copeland/Copeland XWEB 500D PROv5
Range: 0
Copeland/Copeland XWEB 500B PROv5
Range: 0
Copeland/XWEB Prollm-fuzzy
Range: <=1.12.1
Copeland/Xweb 500d Pro Firmware2 versions
cpe:2.3:o:copeland:xweb_300d_pro_firmware:*:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:o:copeland:xweb_300d_pro_firmware:*:*:*:*:*:*:*:*range: <=1.12.1
- cpe:2.3:o:copeland:xweb_500d_pro_firmware:*:*:*:*:*:*:*:*range: <=1.12.1
Copeland/Xweb 500b Pro Firmware
cpe:2.3:o:copeland:xweb_500b_pro_firmware:*:*:*:*:*:*:*:*
Range: <=1.12.1

Patches

Vulnerability mechanics

References

github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-057-10.jsonnvdThird Party Advisory
www.cisa.gov/news-events/ics-advisories/icsa-26-057-10nvdThird Party AdvisoryUS Government Resource
webapps.copeland.com/Dixell/Pages/SystemSoftwareUpdatenvdProduct

News mentions

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