What is the CVSS score of CVE-2023-37020?

CVE-2023-37020 has a CVSS 3.1 base score of 8.6 (High). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H. EPSS exploitation probability: 0.3%.

Which versions of Open5gs are affected by CVE-2023-37020?

CVE-2023-37020 presents significant security risk rated CVSS 8.6. Successful exploitation could significantly impact the confidentiality, integrity, or availability of affected systems.

Is there a public PoC exploit available for CVE-2023-37020?

Yes, a public proof-of-concept exploit is available for CVE-2023-37020. Prioritise patching immediately. EPSS: 0.3%.

How to fix or mitigate CVE-2023-37020?

Within 7 days: Identify all affected systems and apply vendor patches promptly. Monitor vendor channels for patch availability.

Open5gs CVE-2023-37020

HIGH

Reachable Assertion (CWE-617)

2025-01-22 cve@mitre.org

Denial Of Service Open5gs

8.6

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

8.6 HIGH

AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Changed

Confidentiality

None

Integrity

None

Availability

High

Lifecycle Timeline

Analysis Generated

Mar 28, 2026 - 18:05 vuln.today

PoC Detected

Apr 22, 2025 - 17:15 vuln.today

Public exploit code

CVE Published

Jan 22, 2025 - 15:15 nvd

HIGH 8.6

DescriptionCVE.org

Open5GS MME versions <= 2.6.4 contain an assertion that can be remotely triggered via a malformed ASN.1 packet over the S1AP interface. An attacker may send a UE Context Release Complete message missing a required MME_UE_S1AP_ID field to repeatedly crash the MME, resulting in denial of service.

AnalysisAI

Open5GS MME versions <= 2.6.4 contain an assertion that can be remotely triggered via a malformed ASN.1 packet over the S1AP interface. Rated high severity (CVSS 8.6), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available and no vendor patch available.

Technical ContextAI

This vulnerability is classified under CWE-617. Open5GS MME versions <= 2.6.4 contain an assertion that can be remotely triggered via a malformed ASN.1 packet over the S1AP interface. An attacker may send a UE Context Release Complete message missing a required MME_UE_S1AP_ID field to repeatedly crash the MME, resulting in denial of service. Affected products include: Open5Gs.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.