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Advisories

Dixell/Copeland XWEB EVO Predictable Administrator Password Generation

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Severity
critical
Date
Affecting

  • XWEB EVO >= 4.3.0, <= 5.8.8

CWE
  • CWE-330 Use of Insufficiently Random Values
CVSS
9.2
CVSS V4 Vector
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Credit
Valentin Lobstein (Chocapikk)
Description
XWEB EVO 4.3.0 through 5.8.8 contains a weak password generation vulnerability that allows remote attackers to derive the Administrator code-of-the-day password using only the device MAC address and date, with no server secret involved. Attackers can analyze the firmware binary xwpasswd, which itself functions as the password generator, to compute valid Administrator credentials offline and authenticate to the device without authorization. This product line reached it's end of service date in March 2026.

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