Medium 5.3Published Jan 18, 2026

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

Updated under an hour ago (Oct 26, 2026, 3:50 PM ET)

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It affects n/a Open5GS. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for n/a Open5GS

Exploited in the last 30 days

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.

CVSS: 5.3 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:P/RL:O/RC:C
Weakness (CWE): CWE-404
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: VulDB
NVD analysis: Modified
Record last updated: Feb 23, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

n/a Open5GS open5gs:open5gs	2.7.0; 2.7.1; 2.7.2; 2.7.3; 2.7.4; 2.7.5; 2.7.6	CNA record
open5gs open5gs open5gs:open5gs	through 2.7.6	NVD

References

References

https://vuldb.com/?id.341732	vdb-entry, technical-description, third-party-advisory
https://vuldb.com/?ctiid.341732	signature, permissions-required, vdb-entry
https://vuldb.com/?submit.735339	third-party-advisory, vdb-entry
https://github.com/open5gs/open5gs/issues/4230	issue-tracking, exploit, vendor-advisory
https://github.com/open5gs/open5gs/issues/4230#issue-3774173079	exploit, issue-tracking, vendor-advisory
https://github.com/open5gs/open5gs/commit/b4707272c1caf6a7d4dca905694ea55557a0545f	patch
https://github.com/open5gs/open5gs/	product

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.