CVE-2026-20797
MEDIUMCopeland XWEB 300D PRO, 500D PRO, 500B PRO < 1.12.1 - Unauthenticated Stack-based Buffer Overflow
Title source: llmDescription
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.
References (3)
Core 3
Core References
Various Sources
https://webapps.copeland.com/Dixell/Pages/SystemSoftwareUpdate
Third Party Advisory, US Government Resource
https://www.cisa.gov/news-events/ics-advisories/icsa-26-057-10
Scores
CVSS v3
4.3
EPSS
0.0078
EPSS Percentile
50.9%
Attack Vector
ADJACENT_NETWORK
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
no
Technical Impact
partial
Details
CWE
CWE-121
CWE-787
Status
published
Products (6)
Copeland/Copeland XWEB 300D PRO
< 1.12.1
Copeland/Copeland XWEB 500B PRO
< 1.12.1
Copeland/Copeland XWEB 500D PRO
< 1.12.1
copeland/xweb_300d_pro_firmware
< 1.12.1
copeland/xweb_500b_pro_firmware
< 1.12.1
copeland/xweb_500d_pro_firmware
< 1.12.1
Published
Feb 27, 2026
Tracked Since
Feb 27, 2026