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CVE-2026-20797

Copeland XWEB and XWEB Pro Stack-based Buffer Overflow

CVSS 4.3 MEDIUMEPSS 0.8%CWE-121
A stack based buffer overflow exists in an API route of XWEB Pro version 1.12.1 and prior, enabling unauthenticated attackers to cause stack corruption and a termination of the program.
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Affected products
Copeland · Copeland XWEB 300D PROCopeland · Copeland XWEB 500B PROCopeland · Copeland XWEB 500D PRO

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