EUVD-2026-67116
GHSA-qj8w-xg5j-jhcr
Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
SBI endpoint is network-reachable with no authentication per description; impact is strictly availability loss with no confidentiality or integrity effect.
Primary rating from Vendor (mitre).
CVSS VectorVendor: mitre
Lifecycle Timeline
4DescriptionCVE.org
Improper input validation in the HandleUpdate function (/sbi/parameter_provision.go) of free5gc v4.0.1 allows attackers to cause a Denial of Service (DoS) via a crafted input.
AnalysisAI
Remote unauthenticated Denial of Service in free5gc v4.0.1 allows network-accessible attackers to crash the 5G core parameter provisioning service by sending a crafted input to the HandleUpdate function in /sbi/parameter_provision.go. The CVSS vector (AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H) confirms no authentication or special preconditions are required, though the EPSS score of 0.15% at the 4th percentile and absence from CISA KEV indicate no public exploit code and no confirmed active exploitation at time of analysis.
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | No authentication is required - the CVSS vector explicitly sets PR:N, confirming unauthenticated access. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 7.5 score with AV:N/AC:L/PR:N/UI:N reflects a straightforward network-reachable DoS requiring no authentication or configuration complexity, which on paper is a serious signal. … 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 | Monitor the free5gc GitHub issue at https://github.com/free5gc/free5gc/issues/765 for a fix release and upgrade to any version beyond v4.0.1 once a patched release is tagged - no specific patch version has been independently confirmed from the available references. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours: identify all instances of free5gc v4.0.1 in production and document direct network accessibility to the provisioning service. …
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Same weakness CWE-20 – Improper Input Validation
View allSame technique Denial Of Service
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External POC / Exploit Code
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