CVE-2026-20797

CRITICAL EPSS 51.2%
Published Feb 27, 20264mo ago · Modified Jun 17, 20262w ago
9.8 CVSS 3.1
Critical
Find Similar
Published Feb 27, 2026 4mo ago
Last Modified Jun 17, 2026 2w ago

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.

CVSS Details

Base Score
9.8
Exploitability
3.9
Impact
5.9
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality High
Integrity High
Availability High

Threat Intelligence

EPSS Exploit Probability
51.2% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available

Weaknesses 2

CWE-121
CWE-787 Out-of-bounds Write Memory Safety

Affected Products 6

VendorProductVersionRange
copelandxweb_300d_pro_firmware* ≤1.12.1
copelandxweb_300d_pro*any
copelandxweb_500d_pro_firmware* ≤1.12.1
copelandxweb_500d_pro*any
copelandxweb_500b_pro_firmware* ≤1.12.1
copelandxweb_500b_pro*any

References 3

  • github.com https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-057-10.json
    Third Party Advisory
  • webapps.copeland.com https://webapps.copeland.com/Dixell/Pages/SystemSoftwareUpdate
    Product
  • cisa.gov https://www.cisa.gov/news-events/ics-advisories/icsa-26-057-10
    Third Party AdvisoryUS Government Resource

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.