CVE-2025-15687 Open5GS SMF Diameter Gx Credit-Control-Answer smf_gx_cca_cb denial of service
Remote attackers can cause a denial of service in Open5GS SMF via the Diameter Gx Credit-Control-Answer handler, requiring an upgrade to mitigate.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-15687?
CVE-2025-15687 is a medium-severity denial of service vulnerability in Open5GS, published on 12 Aug 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
A security flaw has been discovered in Open5GS up to 2.7.6. Impacted is the function smf_gx_cca_cb of the component SMF Diameter Gx Credit-Control-Answer Handler. The manipulation results in denial of service. The attack can be launched remotely. The exploit has been released to the public and may be used for attacks. Upgrading to version 2.7.7 is recommended to address this issue. The patch is identified as f23d7a5e959acd8f37b925dc29b85f26b7d391cb. Upgrading the affected component is advised.
Weakness: CWE-404
Which versions are affected by CVE-2025-15687?
How do I fix CVE-2025-15687?
No fix has been published for CVE-2025-15687 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2025-15687 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-15687 exists.
Sources
Also known as GHSA-cfh6-r6wv-jf9h.