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CVE Vulnerability Details :
CVE-2026-20797
PUBLISHED
More InfoOfficial Page
Assigner-icscert
Assigner Org ID-7d14cffa-0d7d-4270-9dc0-52cabd5a23a6
View Known Exploited Vulnerability (KEV) details
Published At-27 Feb, 2026 | 01:03
Updated At-27 Feb, 2026 | 01:03
Rejected At-
▼CVE Numbering Authority (CNA)
Copeland XWEB and XWEB Pro Stack-based Buffer Overflow

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 Products
Vendor
Copeland
Product
Copeland XWEB 300D PRO
Default Status
unaffected
Versions
Affected
  • From 0 through 1.12.1 (custom)
Vendor
Copeland
Product
Copeland XWEB 500D PRO
Default Status
unaffected
Versions
Affected
  • From 0 through 1.12.1 (custom)
Vendor
Copeland
Product
Copeland XWEB 500B PRO
Default Status
unaffected
Versions
Affected
  • From 0 through 1.12.1 (custom)
Problem Types
TypeCWE IDDescription
N/AN/AWE-121
Type: N/A
CWE ID: N/A
Description: WE-121
Metrics
VersionBase scoreBase severityVector
3.14.3MEDIUM
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Version: 3.1
Base score: 4.3
Base severity: MEDIUM
Vector:
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions

Copeland has provided a fix for the vulnerabilities and recommends users update the XWEB Pro to the latest version by going to their software update page https://webapps.copeland.com/Dixell/Pages/SystemSoftwareUpdate in the sections dedicated to the different XWEBPRO models page.

Alternatively, a user logged into an XWEB Pro with internet access can update XWEB Pro directly from Copeland servers via the menu SYSTEM -- Updates | Network.

Configurations
Workarounds
Exploits
Credits
finder
Amir Zaltzman and Noam Moshe of Claroty Team82 reported this vulnerability to CISA.
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
https://webapps.copeland.com/Dixell/Pages/SystemSoftwareUpdate
N/A
https://www.cisa.gov/news-events/ics-advisories/icsa-26-057-10
N/A
https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-057-10.json
N/A
Hyperlink: https://webapps.copeland.com/Dixell/Pages/SystemSoftwareUpdate
Resource: N/A
Hyperlink: https://www.cisa.gov/news-events/ics-advisories/icsa-26-057-10
Resource: N/A
Hyperlink: https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-057-10.json
Resource: N/A
Details not found