What is the CVSS score of CVE-2026-2521?

CVE-2026-2521 has a CVSS 3.1 base score of 5.3 (Medium). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L. EPSS exploitation probability: 0.0%.

Which versions of Open5gs are affected by CVE-2026-2521?

Organizations using Open5GS should be aware of moderate risk from CVE-2026-2521, a buffer overflow vulnerability rated CVSS 5.3. Exploitation could cause memory corruption or application crashes.

Is there a public PoC exploit available for CVE-2026-2521?

Yes, a public proof-of-concept exploit is available for CVE-2026-2521. Prioritise patching immediately. EPSS: 0.0%.

How to fix or mitigate CVE-2026-2521?

Within 30 days: Identify affected systems running Open5GS and apply vendor patches as part of regular patch cycle. Monitor vendor channels for patch availability.

Open5gs CVE-2026-2521

MEDIUM

Buffer Overflow (CWE-119)

2026-02-15 cna@vuldb.com

Memory Corruption Open5gs

5.3

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

5.3 MEDIUM

AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

Low

Lifecycle Timeline

Analysis Generated

Mar 12, 2026 - 21:54 vuln.today

PoC Detected

Feb 18, 2026 - 19:42 vuln.today

Public exploit code

CVE Published

Feb 15, 2026 - 23:16 nvd

MEDIUM 5.3

DescriptionCVE.org

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.

AnalysisAI

Memory corruption in Open5GS versions up to 2.7.6 allows remote attackers to trigger a denial of service condition by manipulating the SGW-C session creation handler, with public exploit code already available. The vulnerability requires no authentication or user interaction and currently lacks a vendor patch, leaving affected deployments vulnerable to remote availability attacks.

Technical ContextAI

Classified as CWE-119 (Buffer Overflow). Affects Open5Gs. 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.

RemediationAI

Monitor vendor advisories for a patch. Enable ASLR, DEP/NX, and stack canaries where possible. Restrict network access to the affected service where possible.