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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.

PUBLISHED Reserved 2026-01-18 | Published 2026-01-18 | Updated 2026-02-23 | Assigner VulDB




MEDIUM: 6.9CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P
MEDIUM: 5.3CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:P/RL:O/RC:C
MEDIUM: 5.3CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:P/RL:O/RC:C
5.0AV:N/AC:L/Au:N/C:N/I:N/A:P/E:POC/RL:OF/RC:C

Problem types

Denial of Service

Timeline

2026-01-18:Advisory disclosed
2026-01-18:VulDB entry created
2026-02-11:VulDB entry last update

Credits

FrankyLin (VulDB User) reporter

FrankyLin (VulDB User) analyst

References

vuldb.com/?id.341732 (VDB-341732 | Open5GS sgwc s11-handler.c sgwc_s11_handle_downlink_data_notification_ack denial of service) vdb-entry technical-description

vuldb.com/?ctiid.341732 (VDB-341732 | CTI Indicators (IOB, IOC, TTP, IOA)) signature permissions-required

vuldb.com/?submit.735339 (Submit #735339 | Open5GS SGWC v2.7.6 Denial of Service) third-party-advisory

github.com/open5gs/open5gs/issues/4230 issue-tracking

github.com/open5gs/open5gs/issues/4230 exploit issue-tracking

github.com/...ommit/b4707272c1caf6a7d4dca905694ea55557a0545f patch

github.com/open5gs/open5gs/ product

cve.org (CVE-2025-15539)

nvd.nist.gov (CVE-2025-15539)

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