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CVE-2026-124005: XWEB EVO Security Vulnerability

CVE-2026-124005 explained: critical Security Vulnerability in XWEB EVO. CVSS 9.2. Affected versions, detection, fixes and CTEM priority.

Last updated: Nov 12, 2026

CVSS
9.2 CRITICAL
EPSS
n/a
CISA KEV
Not listed
CWE
CWE-330

Sources: National Vulnerability Database, CVE.org, CISA KEV, FIRST EPSS

CVE-2026-124005 Overview

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.

Critical Impact

Remote, unauthenticated attackers can exploit this Security Vulnerability in XWEB EVO. The CVSS base score is 9.2 (Critical).

Affected Products

  • XWEB EVO: see the vendor advisory for the exact affected versions

Discovery Timeline

  • 2026-11-12: CVE-2026-124005 published to the National Vulnerability Database by disclosure@vulncheck.com
  • 2026-11-12: last updated in the NVD database

Technical Details for CVE-2026-124005

Vulnerability Analysis

CVE-2026-124005 is a Security Vulnerability weakness (CWE-330) in XWEB EVO. Based on its CVSS vector, the flaw can be reached over the network, needs no login, and needs no user interaction.

With a CVSS base score of 9.2, apply the vendor fix and confirm exposure on internet facing and business critical assets first.

Root Cause

The vendor description states: 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.

Attack Vector

Based on the CVSS vector, the flaw can be reached over the network, needs no login, and needs no user interaction. Attack complexity is low complexity.

No exploitation in the wild is confirmed by CISA at the time of the last update. Check the references below for any vendor or researcher proof of concept.

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Detection Methods for CVE-2026-124005

Detection Strategies

  • Inventory every instance of XWEB EVO and compare the running version with the affected range above.
  • Check external attack surface scans for internet facing instances of the component.
  • Run an authenticated vulnerability scan once your scanner ships a check for this CVE.

Monitoring Recommendations

  • Forward XWEB EVO application, access and audit logs to your SIEM for retrospective hunting.
  • Alert on new processes, configuration changes or outbound connections from the affected service.
  • Track the vendor advisory and the CISA KEV catalog for changes in exploitation status.

How to Mitigate CVE-2026-124005

Immediate Actions Required

  • Apply the fixed version of XWEB EVO named in the vendor advisory.
  • Prioritize internet facing and business critical instances first.
  • Rescan after the change to confirm the exposure is closed.

Patch Information

Use the fixed version listed in the vendor advisory for XWEB EVO.

Workarounds

  • If patching must wait, restrict network access to the affected service and place it behind authentication or a web application firewall rule.

CWE References

Technical References

This entry is built directly from NVD, CISA KEV and EPSS data. Verify fixed versions in the vendor advisory before you deploy.

Frequently asked questions

CVE-2026-124005 is a critical severity Security Vulnerability in XWEB EVO with a CVSS score of 9.2. Apply the vendor fix and confirm exposure on internet facing and business critical assets first.

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