CVE-2025-5520: OPEN5GS

Medium severity, CVSS 5.3. EPSS: 0.9% chance of exploitation in the next 30 days.

A vulnerability was found in Open5GS up to 2.7.3. It has been classified as problematic. Affected is the function gmm_state_authentication/emm_state_authentication of the component AMF/MME. The manipulation leads to reachable assertion. It is possible to launch the attack remotely. The exploit has been disclosed to the public and may be used. The name of the patch is 9f5d133657850e6167231527514ee1364d37a884. It is recommended to apply a patch to fix this issue. This is a different issue than CVE-2025-1893.

Affected products

• OPEN5GS OPEN5GS: from 2.7.0, up to and including 2.7.3

Published 2025-06-03. Last modified 2026-06-17.