EUVD-2026-71040
GHSA-q387-rm8q-3pr3
Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Account enumeration discloses only username existence, not credentials or sensitive content, warranting C:L rather than the vendor-assigned C:H.
Primary rating from Vendor (TR-CERT).
CVSS VectorVendor: TR-CERT
Lifecycle Timeline
3DescriptionCVE.org
Observable response discrepancy vulnerability in Menulux Software Inc. Menulux Portal allows Account Footprinting.
This issue affects Menulux Portal: before 20260903211448.
AnalysisAI
Observable response discrepancy in Menulux Portal (all builds before 20260903211448) enables unauthenticated account footprinting against the portal's login or account-resolution endpoint. By observing measurable differences in server responses - such as distinct HTTP status codes, error messages, or timing - for valid versus invalid account identifiers, an attacker can systematically enumerate existing user accounts. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | No authentication, special configuration, or privileged position is required - exploitation is fully unauthenticated against the network-accessible Menulux Portal login or account-lookup endpoint in its default deployment. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 vector AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N indicates a fully unauthenticated, low-complexity, network-reachable vulnerability with no user interaction required, which correctly reflects the ease of automated exploitation. … 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 | Upgrade Menulux Portal to build version 20260903211448 or later, which remediates the observable response discrepancy per the TR-CERT advisory at https://siberguvenlik.gov.tr/guvenlik-bildirimleri/detay/tr-26-0989. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, inventory all Menulux Portal instances and confirm their build version against the vulnerable threshold (before 20260903211448); enable detailed logging and alerting on login and account-resolution endpoints to establish baseline enumeration detection. …
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Same weakness CWE-204 – Observable Response Discrepancy
View allSame technique Information Disclosure
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External POC / Exploit Code
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