What is the CVSS score of CVE-2026-1521?

CVE-2026-1521 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: 0.1%.

Which versions of Open5gs are affected by CVE-2026-1521?

Organizations using Open5GS should be aware of moderate risk from CVE-2026-1521 rated CVSS 5.3. Exploitation could compromise the security of affected deployments.. A patch is available.

Is there a public PoC exploit available for CVE-2026-1521?

Yes, a public proof-of-concept exploit is available for CVE-2026-1521. Prioritise patching immediately. EPSS: 0.1%.

How to fix or mitigate CVE-2026-1521?

Within 30 days: Identify affected systems running Open5GS and apply vendor patches as part of regular patch cycle. Vendor patch is available.

Open5gs CVE-2026-1521

MEDIUM

Improper Resource Shutdown or Release (CWE-404)

2026-01-28 cna@vuldb.com

Denial Of Service 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 23, 2026 - 09:16 vuln.today

Public exploit code

Patch released

Feb 23, 2026 - 09:16 nvd

Patch available

CVE Published

Jan 28, 2026 - 15:16 nvd

MEDIUM 5.3

DescriptionCVE.org

A security flaw has been discovered in Open5GS up to 2.7.6. This affects the function sgwc_s5c_handle_bearer_resource_failure_indication of the file src/sgwc/s5c-handler.c of the component SGWC. Performing a manipulation results in denial of service. The attack can be initiated remotely. The exploit has been released to the public and may be used for attacks. The patch is named 69b53add90a9479d7960b822fc60601d659c328b. It is recommended to apply a patch to fix this issue.

AnalysisAI

Remote denial of service in Open5GS up to version 2.7.6 allows unauthenticated attackers to crash the SGWC component by manipulating bearer resource failure indication messages. Public exploit code exists for this vulnerability, and a patch is available in commit 69b53add90a9479d7960b822fc60601d659c328b.

Technical ContextAI

Classified as CWE-404 (Improper Resource Shutdown or Release). Affects the denial of component of Open5Gs. A security flaw has been discovered in Open5GS up to 2.7.6. This affects the function sgwc_s5c_handle_bearer_resource_failure_indication of the file src/sgwc/s5c-handler.c of the component SGWC. Performing a manipulation results in denial of service. The attack can be initiated remotely. The exploit has been released to the public and may be used for attacks. The patch is named 69b53add90a9479d7960b822fc60601d659c328b. It is recommended to apply a patch to fix this issue.