What’s Vulnerable › Vulnerabilities

CVE-2025-15539: Open5GS sgwc s11-handler.c sgwc_s11_handle_downlink_data_notification_ack denial of service

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.7% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2026-01-19 · updated 2026-06-17
• Weakness: CWE-404

Description

A vulnerability was determined in Open5GS up to 2.7.6. Impacted is the function sgwc_s11_handle_downlink_data_notification_ack of the file src/sgwc/s11-handler.c of the component sgwc. This manipulation causes denial of service. The attack can be initiated remotely. The exploit has been publicly disclosed and may be utilized. Patch name: b4707272c1caf6a7d4dca905694ea55557a0545f. To fix this issue, it is recommended to deploy a patch. The issue report is flagged as already-fixed.

Affected products

• Open5GS: through 2.7.6

References

• https://github.com/open5gs/open5gs/
• https://github.com/open5gs/open5gs/commit/b4707272c1caf6a7d4dca905694ea55557a0545f
• https://github.com/open5gs/open5gs/issues/4230
• https://github.com/open5gs/open5gs/issues/4230#issue-3774173079
• https://vuldb.com/?ctiid.341732
• https://vuldb.com/?id.341732
• https://vuldb.com/?submit.735339

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