Vulnerability in Open5gs
CVE-2025-15686
A vulnerability has been found in Open5GS up to 2.7.6. Affected by this issue is the function fd_msg_sess_get of the component HSS Service. Such manipulation of the argument Session-Id leads to denial of service. The attack may be performed from remote. The exploit has been disclosed to the public and may be used. The project locked and limited conversation to collaborators.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L.
EPSS exploit prediction
EPSS: 0.005 (42.7th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 43rd percentile — 42.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.005 · change: +0.002
Affected products
- Open5gs — versions 2.7.0, 2.7.1, 2.7.2
Weakness classification (CWE)
References
- vuldb.com/vuln/387279 (technical-description, vdb-entry)
- vuldb.com/vuln/387279/cti (signature, permissions-required)
- vuldb.com/cve/CVE-2025-15686 (third-party-advisory)
- vuldb.com/submit/867104 (third-party-advisory)
- github.com/open5gs/open5gs/issues/4190 (issue-tracking)
- github.com/user-attachments/files/23847497/HSS_ULR_error_poc.pcapng.zip (exploit)
- github.com/open5gs/open5gs/ (product)
Frequently asked questions
- What is CVE-2025-15686?
- CVE-2025-15686 is a medium-severity vulnerability in Open5gs, classified under Improper Resource Shutdown or Release. CVSS score: 4.3/10. Published 2026-08-12.
- How severe is CVE-2025-15686?
- Medium severity. CVSS v3 base score is 4.3 out of 10.