CVE-2026-2521 Open5GS SGW-C sgwc_s5c_handle_create_session_response memory corruption
Remote attackers can trigger memory corruption in Open5GS SGW-C via crafted session responses, potentially leading to code execution or service disruption.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-2521?
CVE-2026-2521 is a medium-severity memory corruption vulnerability in Open5gs Open5gs, published on 15 Feb 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A weakness has been identified in Open5GS up to 2.7.6. This issue affects the function sgwc_s5c_handle_create_session_response of the component SGW-C. Executing a manipulation can lead to memory corruption. The attack may be performed from remote. The exploit has been made available to the public and could be used for attacks. The project was informed of the problem early through an issue report but has not responded yet.
Weakness: CWE-119
Which versions are affected by CVE-2026-2521?
It affects 1 product.
Products include Open5gs Open5gs.
How do I fix CVE-2026-2521?
No fix has been published for CVE-2026-2521 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-2521 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-2521 exists.
Other vulnerabilities in Open5gs Open5gs
Sources
Also known as GHSA-3pqw-6hf5-8r97.