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Vulnerability Details :

CVE-2026-20797

Summary
Assigner-icscert
Assigner Org ID-7d14cffa-0d7d-4270-9dc0-52cabd5a23a6
Published At-27 Feb, 2026 | 01:03
Updated At-02 Mar, 2026 | 14:25
Rejected At-
Credits

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.

Vendors
-
Not available
Products
-
Metrics (CVSS)
VersionBase scoreBase severityVector
Weaknesses
Attack Patterns
Solution/Workaround
References
HyperlinkResource Type
EPSS History
Score
Latest Score
-
N/A
No data available for selected date range
Percentile
Latest Percentile
-
N/A
No data available for selected date range
Stakeholder-Specific Vulnerability Categorization (SSVC)
▼Common Vulnerabilities and Exposures (CVE)
cve.org
Assigner:icscert
Assigner Org ID:7d14cffa-0d7d-4270-9dc0-52cabd5a23a6
Published At:27 Feb, 2026 | 01:03
Updated At:02 Mar, 2026 | 14:25
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
▼Authorized Data Publishers (ADP)
CISA ADP Vulnrichment
Affected Products
Metrics
VersionBase scoreBase severityVector
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions

Configurations

Workarounds

Exploits

Credits

Timeline
EventDate
Replaced By

Rejected Reason

References
HyperlinkResource
Information is not available yet
▼National Vulnerability Database (NVD)
nvd.nist.gov
Source:ics-cert@hq.dhs.gov
Published At:27 Feb, 2026 | 02:16
Updated At:27 Feb, 2026 | 23:10

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.

CISA Catalog
Date AddedDue DateVulnerability NameRequired Action
N/A
Date Added: N/A
Due Date: N/A
Vulnerability Name: N/A
Required Action: N/A
Metrics
TypeVersionBase scoreBase severityVector
Secondary3.14.3MEDIUM
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Primary3.19.8CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Type: Secondary
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
Type: Primary
Version: 3.1
Base score: 9.8
Base severity: CRITICAL
Vector:
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CPE Matches

copeland
copeland
>>xweb_300d_pro_firmware>>Versions up to 1.12.1(inclusive)
cpe:2.3:o:copeland:xweb_300d_pro_firmware:*:*:*:*:*:*:*:*
copeland
copeland
>>xweb_300d_pro>>-
cpe:2.3:h:copeland:xweb_300d_pro:-:*:*:*:*:*:*:*
copeland
copeland
>>xweb_500d_pro_firmware>>Versions up to 1.12.1(inclusive)
cpe:2.3:o:copeland:xweb_500d_pro_firmware:*:*:*:*:*:*:*:*
copeland
copeland
>>xweb_500d_pro>>-
cpe:2.3:h:copeland:xweb_500d_pro:-:*:*:*:*:*:*:*
copeland
copeland
>>xweb_500b_pro_firmware>>Versions up to 1.12.1(inclusive)
cpe:2.3:o:copeland:xweb_500b_pro_firmware:*:*:*:*:*:*:*:*
copeland
copeland
>>xweb_500b_pro>>-
cpe:2.3:h:copeland:xweb_500b_pro:-:*:*:*:*:*:*:*
Weaknesses
CWE IDTypeSource
CWE-787Primarynvd@nist.gov
CWE ID: CWE-787
Type: Primary
Source: nvd@nist.gov
Evaluator Description

Evaluator Impact

Evaluator Solution

Vendor Statements

References
HyperlinkSourceResource
https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-057-10.jsonics-cert@hq.dhs.gov
Third Party Advisory
https://webapps.copeland.com/Dixell/Pages/SystemSoftwareUpdateics-cert@hq.dhs.gov
Product
https://www.cisa.gov/news-events/ics-advisories/icsa-26-057-10ics-cert@hq.dhs.gov
Third Party Advisory
US Government Resource
Hyperlink: https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-057-10.json
Source: ics-cert@hq.dhs.gov
Resource:
Third Party Advisory
Hyperlink: https://webapps.copeland.com/Dixell/Pages/SystemSoftwareUpdate
Source: ics-cert@hq.dhs.gov
Resource:
Product
Hyperlink: https://www.cisa.gov/news-events/ics-advisories/icsa-26-057-10
Source: ics-cert@hq.dhs.gov
Resource:
Third Party Advisory
US Government Resource

Change History

0
Information is not available yet

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