CVE-2026-20797
Modified Modified - Updated After Analysis

Stack-Based Buffer Overflow in XWEB Pro API Causes Crash

Publication date: 2026-02-27

Last updated on: 2026-05-10

Assigner: ICS-CERT

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.

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Meta Information

Published
2026-02-27
Last Modified
2026-05-10
Generated
2026-07-06
AI Q&A
2026-02-27
EPSS Evaluated
2026-07-05
NVD
CVE-2026-20797
EUVD
EUVD-2026-8972

Affected Vendors & Products

Showing 3 associated CPEs
Vendor Product Version / Range
copeland xweb_300d_pro_firmware to 1.12.1 (inc)
copeland xweb_500d_pro_firmware to 1.12.1 (inc)
copeland xweb_500b_pro_firmware to 1.12.1 (inc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-121 A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function).
CWE-787 The product writes data past the end, or before the beginning, of the intended buffer.

Attack-Flow Graph

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Executive Summary

This vulnerability is a stack-based buffer overflow found in an API route of XWEB Pro version 1.12.1 and earlier. It allows unauthenticated attackers to cause stack corruption, which can lead to the termination of the program.

Impact Analysis

The vulnerability can cause the affected program to terminate unexpectedly due to stack corruption. This denial of service could disrupt normal operations and availability of the service.

Compliance Impact

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Detection Guidance

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