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CVE-2026-1521

5.3 · MEDIUM

A security flaw has been discovered in Open5GS up to 2.7.6.

Published Jan 28, 2026CWE-404EPSS 0.59%

Overview

CVE-2026-1521 is a medium-severity vulnerability. It was published on January 28, 2026 and has a CVSS 3.1 base score of 5.3 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 5.3, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgithub.com/open5gs/open5gs/GitHubgithub.com/open5gs/open5gs/commit/69b53add90a9479d7960b822fc60601d659c328bGitHubgithub.com/open5gs/open5gs/issues/4268GitHubgithub.com/open5gs/open5gs/issues/4268#event-21989483261GitHubgithub.com/open5gs/open5gs/issues/4268#issue-3795012861Refvuldb.com/?ctiid.343192Refvuldb.com/?id.343192Refvuldb.com/?submit.738370

How CyberStrike helps

Frequently asked questions

What is CVE-2026-1521?

CVE-2026-1521 is a medium-severity vulnerability. It was published on January 28, 2026 and has a CVSS 3.1 base score of 5.3 (MEDIUM).

How severe is CVE-2026-1521?

This vulnerability has a CVSS 3.1 base score of 5.3, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2026-1521?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-1521?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-1521 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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