EUVD-2026-67110
GHSA-98vm-6799-43c3
Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NAS Registration is a pre-auth protocol message, so PR:N is correct; parsing is fully automated with no UI; impact is availability-only with no C/I effect.
Primary rating from Vendor (mitre).
CVSS VectorVendor: mitre
Lifecycle Timeline
5DescriptionCVE.org
An issue in the NAS decoder component of free5gc v4.0.1 allows attackers to cause a Denial of Service (DoS) via a crafted Registration Request message.
AnalysisAI
Denial of service in free5gc v4.0.1's NAS decoder allows unauthenticated remote attackers to crash the AMF (Access and Mobility Management Function) by sending a crafted Registration Request message, disrupting 5G core network availability. The CVSS vector (AV:N/AC:L/PR:N/UI:N/A:H) confirms zero-prerequisite network exploitability - any host able to reach the N1 interface can trigger the fault. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | No special configuration is required beyond free5gc v4.0.1 being deployed with the AMF's N1 interface network-reachable by the attacker. … 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/S:U/C:N/I:N/A:H reflects a technically straightforward, unauthenticated network-exploitable DoS with no authentication or interaction requirements. … 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 has been identified at time of analysis - the GitHub issue (https://github.com/free5gc/free5gc/issues/813) should be monitored for a fix commit or tagged release. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours: identify all free5gc v4.0.1 deployments and assess network exposure of the N1 interface; immediately restrict access using firewall rules or network segmentation to trusted sources only. …
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Same technique Denial Of Service
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External POC / Exploit Code
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