Vulnerability record/PUBLISHED/Published Nov 12, 2026 19:44:23 UTC

CVE-2026-124006

XWEB EVO through 5.8.8 contains a predictable credential generation vulnerability that allows attackers to derive the Linux root password by computing a fixed prefix combined with a daily password value. Attackers can calculate the deterministic root credential, which before 5.7.0 was identical across all units and from 5.7.0 onward remains derivable from the MAC-based daily password, to gain unauthorized root access to the underlying operating system. This product line reached it's end of service date in March 2026.

Base score9.2/ 10

SeverityCriticalCVSS 4.0

Exploitability / impact

CVSS metric breakdown

Vector-derived attributes

Base severityCritical

Attack vectorNetworkAV

Attack complexityLowAC

Attack requirementsPresentAT

Privileges requiredNonePR

User interactionNoneUI

Vulnerable system confidentialityHighVC

Vulnerable system integrityHighVI

Vulnerable system availabilityHighVA

Subsequent system confidentialityNoneSC

Subsequent system integrityNoneSI

Subsequent system availabilityNoneSA

CVSS vector stringCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

CVSS communicates standardized severity and impact characteristics. It does not establish whether a system is exploitable in your specific environment.

Record context

CVE Numbering AuthorityVulnCheck

Last updatedNov 13, 2026 22:33:10 UTC

PublishedNov 12, 2026 19:44:23 UTC

ReservedNov 6, 2026 18:38:38 UTC

Credits

Valentin Lobstein (Chocapikk)