Vulnerability in Open5gs
CVE-2025-5520
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L.
EPSS exploit prediction
EPSS: 0.009 (56.6th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 57th percentile — 56.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.008 · newest: 0.009 · change: +0.000
Affected products
- Open5gs
- Open5gs — versions 2.7.0, 2.7.1, 2.7.2
Weakness classification (CWE)
References
- vuldb.com/ (technical-description, VDB Entry, Third Party Advisory, vdb-entry)
- vuldb.com/ (signature, Permissions Required, permissions-required, VDB Entry)
- vuldb.com/ (VDB Entry, Third Party Advisory, third-party-advisory)
- github.com/open5gs/open5gs/issues/3910 (issue-tracking, Exploit, Issue Tracking)
- github.com/open5gs/open5gs/issues/3910 (issue-tracking, Exploit, Issue Tracking)
- github.com/user-attachments/files/20362243/Problematic.handover.required.proces… (Exploit, exploit)
- github.com/open5gs/open5gs/commit/9f5d133657850e6167231527514ee1364d37a884 (Patch, patch)
Frequently asked questions
- What is CVE-2025-5520?
- CVE-2025-5520 is a medium-severity vulnerability in Open5gs, classified under Reachable Assertion. CVSS score: 5.3/10. Published 2025-06-03.
- How severe is CVE-2025-5520?
- Medium severity. CVSS v3 base score is 5.3 out of 10.