CVE-2023-37005: OPEN5GS

Medium severity, CVSS 5.3. EPSS: 0.3% chance of exploitation in the next 30 days.

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 an `Initial Context Setup Failure` message missing a required `MME_UE_S1AP_ID` field to repeatedly crash the MME, resulting in denial of service.

Affected products

• OPEN5GS OPEN5GS: up to and including 2.6.4

Published 2025-01-22. Last modified 2026-06-17.