{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-33283", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-03-18T18:55:47.425Z", "datePublished": "2026-03-23T23:49:42.539Z", "dateUpdated": "2026-03-24T15:12:39.668Z"}, "containers": {"cna": {"title": "Ella Core panics on malformed ULNASTransport Message without a Request Type", "problemTypes": [{"descriptions": [{"cweId": "CWE-476", "lang": "en", "description": "CWE-476: NULL Pointer Dereference", "type": "CWE"}]}], "metrics": [{"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 6.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}}], "references": [{"name": "https://github.com/ellanetworks/core/security/advisories/GHSA-3366-gw57-fcm5", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/ellanetworks/core/security/advisories/GHSA-3366-gw57-fcm5"}], "affected": [{"vendor": "ellanetworks", "product": "core", "versions": [{"version": "< 1.6.0", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-03-23T23:49:42.539Z"}, "descriptions": [{"lang": "en", "value": "Ella Core is a 5G core designed for private networks. Versions prior to 1.6.0 panic when processing malformed UL NAS Transport NAS messages without a Request Type. An attacker able to send crafted NAS messages to Ella Core can crash the process, causing service disruption for all connected subscribers. No authentication is required. Version 1.6.0 adds a guard when receiving an UL NAS Message without a Request Type given no SM Context."}], "source": {"advisory": "GHSA-3366-gw57-fcm5", "discovery": "UNKNOWN"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-03-24T14:12:37.211448Z", "id": "CVE-2026-33283", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-03-24T15:12:39.668Z"}}]}}

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{"configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:ellanetworks:ella_core:*:*:*:*:*:*:*:*", "matchCriteriaId": "4A60BFD6-666C-4509-BE38-04CBFF557242", "versionEndExcluding": "1.6.0", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Ella Core is a 5G core designed for private networks. Versions prior to 1.6.0 panic when processing malformed UL NAS Transport NAS messages without a Request Type. An attacker able to send crafted NAS messages to Ella Core can crash the process, causing service disruption for all connected subscribers. No authentication is required. Version 1.6.0 adds a guard when receiving an UL NAS Message without a Request Type given no SM Context."}, {"lang": "es", "value": "Ella Core es un n\u00facleo 5G dise\u00f1ado para redes privadas. Versiones anteriores a la 1.6.0 entran en p\u00e1nico al procesar mensajes NAS de transporte UL NAS malformados sin un Request Type. Un atacante capaz de enviar mensajes NAS manipulados a Ella Core puede bloquear el proceso, causando interrupci\u00f3n del servicio para todos los suscriptores conectados. No se requiere autenticaci\u00f3n. La versi\u00f3n 1.6.0 a\u00f1ade una protecci\u00f3n al recibir un Mensaje NAS UL sin un Request Type dado que no hay Contexto SM."}], "id": "CVE-2026-33283", "lastModified": "2026-03-24T19:30:01.170", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 6.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 3.6, "source": "security-advisories@github.com", "type": "Secondary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2026-03-24T00:16:30.530", "references": [{"source": "security-advisories@github.com", "tags": ["Vendor Advisory"], "url": "https://github.com/ellanetworks/core/security/advisories/GHSA-3366-gw57-fcm5"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-476"}], "source": "security-advisories@github.com", "type": "Primary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,1.6.0)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "core", "source": "cna", "vendor": "ellanetworks"}, "product": "core", "vendor": "ellanetworks"}], "analysis": {"en": {"generated_at": "2026-03-24T20:54:04.743726+00:00", "value": {"mitigation_remediation": ["Upgrade Ella Core to version 1.6.0 or later.", "Deploy network filtering to drop malformed UL NAS Transport messages that lack a Request Type if you cannot upgrade immediately.", "After applying the fix, verify that the core processes NAS messages normally and monitor traffic for abnormal patterns."], "summary": {"action": "Immediate Patch", "impact": "Denial of Service"}, "threat_synthesis": {"affected_systems": "All deployments of Ellanetworks:core running a pre\u20111.6.0 release are affected. The CPE identifier for Ella Core identifies these releases. From version 1.6.0 onward a guard was added that prevents the crash even when a UL NAS message lacks a Request Type.", "description_and_impact": "Ella Core is a 5G core designed for private networks. A flaw causes the core to crash when it receives malformed UL NAS Transport messages that do not include a Request Type. The crash terminates critical processing, leaving all connected subscribers without service and creating a denial of service. The weakness is a classic null pointer dereference mapped to CWE\u2011476, and no authentication is needed to trigger it.", "risk_and_exploitability": "The vulnerability carries a moderate severity rating of 6.5. An estimated exploitation likelihood is below 1%, and it is not listed in the CISA Known Exploited Vulnerabilities catalogue. An attacker can reach the vulnerable component by sending crafted NAS messages over the network, which does not require privilege or authentication. While the probability of exploitation is low, any successful exploitation would result in a complete outage of the 5G core and could seriously disrupt services that depend on it."}}}}, "created": "2026-03-24T10:29:43.448313+00:00", "updated": "2026-03-25T21:27:50.247667+00:00", "vendors": ["ellanetworks", "ellanetworks$PRODUCT$core"]}