CVE-2026-20797

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CVSS 3.1

9.8 critical

EPSS

<1%p54

Published

Feb 27, 2026 (Feb 27, 2026)

Modified

Jun 17, 2026

Description

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.

Vendors: copeland
Products: xweb 300d pro firmware, xweb 500d pro firmware, xweb 500b pro firmware
Weakness: CWE-787, CWE-121
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

NVD CVE.org GitHub PoCs EPSS (0.8%)

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