CVE-2023-37020

8.6 highEPSS 0.8%

High (8.6) in open5gs open5gs. EPSS 0.8% 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 a `UE Context Release Complete` message missing a required `MME_UE_S1AP_ID` field to repeatedly crash the MME, resulting in denial of service.

Severity

CVSS 3.1

8.6 high

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

EPSS: 0.8% chance of exploitation in the next 30 days; higher than 57% of CVEs (scores of 2026-11-01)
CWE: CWE-617
Published: 2025-01-22
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

open5gs:open5gs

References

https://cellularsecurity.org/ransacked

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