EUVD-2026-71445
GHSA-cx2g-php6-x9c3
Severity by source
AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
PR:L reflects mandatory Standard-role authentication; I:H is warranted because arbitrary writes to gateway config directories can fundamentally alter security policy, with confidentiality and availability impacts remaining limited.
Primary rating from Vendor (mitre).
CVSS VectorVendor: mitre
Lifecycle Timeline
5DescriptionCVE.org
An issue in the ugw-editfile method of /cgi-bin/wwwugw.cgi in MBS-Solutions X-Serie Gateway firmware V6_00_05 allows a remote authenticated user with the low-privileged Standard role to write arbitrary content to files within /uxx/config/ and /ugw/config/.
AnalysisAI
Improper access control in the MBS-Solutions X-Serie Gateway firmware V6_00_05 permits an authenticated Standard-role user to write arbitrary content to gateway configuration directories via the ugw-editfile method exposed at /cgi-bin/wwwugw.cgi, bypassing the role-based restrictions that should confine write operations to administrative accounts. Exploitation is bounded by the requirement for a valid Standard-role credential but requires no further privileges, enabling persistent unauthorized modification of files under /uxx/config/ and /ugw/config/ - directories that govern gateway routing, access policies, and operational configuration. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires a valid authenticated session under an account assigned the Standard role on the MBS-Solutions X-Serie Gateway web management interface running firmware V6_00_05. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | Real-world risk is moderate and tightly bounded by the authentication prerequisite. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | No vendor-released patch or patched firmware version has been identified in available references at the time of analysis; operators should contact MBS-Solutions directly via https://en.mbs-solutions.de/mbs to obtain a remediated firmware build and verify whether V6_00_05 is the sole affected release. … Detailed patch versions, workarounds, and compensating controls in full report. |
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Same weakness CWE-284 – Improper Access Control
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External POC / Exploit Code
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