What’s Vulnerable › Vulnerabilities

CVE-2026-1521: Open5GS SGWC s5c-handler.c denial of service

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.6% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2026-01-28 · updated 2026-06-17
• Weakness: CWE-404

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.

Affected products

• Open5GS: through 2.7.6

References

• https://github.com/open5gs/open5gs/
• https://github.com/open5gs/open5gs/commit/69b53add90a9479d7960b822fc60601d659c328b
• https://github.com/open5gs/open5gs/issues/4268
• https://github.com/open5gs/open5gs/issues/4268#event-21989483261
• https://github.com/open5gs/open5gs/issues/4268#issue-3795012861
• https://vuldb.com/?ctiid.343192
• https://vuldb.com/?id.343192
• https://vuldb.com/?submit.738370

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