by Kastro
Paper/Archive/CVE-2026-20797

CVE-2026-20797

Copeland Copeland XWEB 300D PRO — Copeland XWEB and XWEB Pro Stack-based Buffer Overflow

EPSS 0.8%CVSS 9.8
critical.is priorityof 100
41
CVSS 9.8 (NVD)9.8 / 10 × 3029.4Not in CISA KEV+300.0EPSS percentile 57.4.574 × 2011.5No public exploit+100.0SSVC exploitation: none+100.0
Description · from the CVE record

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.

Affected

ProductAffectedFixed inSource
Copeland XWEB 300D PRO≤ 1.12.1–CNA
Copeland XWEB 500D PRO≤ 1.12.1–CNA
Copeland XWEB 500B PRO≤ 1.12.1–CNA

Scores by source

NVD9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
icscert (CNA)4.3CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
CISA ADPSSVCExploitation: none · Automatable: no · Technical impact: partial

References

refwebapps.copeland.com/Dixell/Pages/SystemSoftwareUpdaterefcisa.gov/news-events/ics-advisories/icsa-26-057-10refgithub.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-057-10.json