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.

Attack Vector Network

Attack Complexity Low

Privileges Required None

Attack Requirements None

User Interaction None

Vulnerable System Confidentiality Impact None

Vulnerable System Integrity Impact None

Vulnerable System Availability Impact Low

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact Low

User Interaction None

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact Low

User Interaction None

Access Vector Network

Access Complexity Low

Authentication None

Confidentiality Impact None

Integrity Impact None

Availability Impact Partial

This CVE is not in the KEV list.

The EPSS score is 0.00075.

Exploitation poc

Automatable yes

Technical Impact partial

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
n/a Open5GS affected
Version Status Constraints
2.7.0 affected —
2.7.1 affected —
2.7.2 affected —
2.7.3 affected —
2.7.4 affected —
2.7.5 affected —
2.7.6 affected —

Configuration 1 [-]

cpe:2.3:a:open5gs:open5gs:*:*:*:*:*:*:*:*

No data.

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Project Subscriptions

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Advisories

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Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://github.com/open5gs/open5gs/commit/b4707272c1caf6a7d4dca905694ea55557a0545f cve-icon cve-icon
https://github.com/open5gs/open5gs/issues/4230 cve-icon cve-icon
https://github.com/open5gs/open5gs/issues/4230#issue-3774173079 cve-icon cve-icon
https://vuldb.com/?ctiid.341732 cve-icon cve-icon
https://vuldb.com/?id.341732 cve-icon cve-icon
https://vuldb.com/?submit.735339 cve-icon cve-icon
History

Tue, 10 Feb 2026 17:15:00 +0000

Type Values Removed Values Added
CPEs cpe:2.3:a:open5gs:open5gs:*:*:*:*:*:*:*:*

Tue, 20 Jan 2026 17:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Mon, 19 Jan 2026 09:45:00 +0000

Type Values Removed Values Added
First Time appeared Open5gs
Open5gs open5gs
Vendors & Products Open5gs
Open5gs open5gs

Sun, 18 Jan 2026 23:45:00 +0000

Type Values Removed Values Added
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.
Title Open5GS sgwc s11-handler.c sgwc_s11_handle_downlink_data_notification_ack denial of service
Weaknesses CWE-404
References
Metrics cvssV2_0

{'score': 5, 'vector': 'AV:N/AC:L/Au:N/C:N/I:N/A:P/E:POC/RL:OF/RC:C'}

cvssV3_0

{'score': 5.3, 'vector': 'CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:P/RL:O/RC:C'}

cvssV3_1

{'score': 5.3, 'vector': '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'}

cvssV4_0

{'score': 6.9, 'vector': 'CVSS: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'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: VulDB

Published:

Updated: 2026-01-20T16:37:51.696Z

Reserved: 2026-01-18T07:33:03.737Z

Link: CVE-2025-15539

cve-icon Vulnrichment

Updated: 2026-01-20T16:37:48.441Z

cve-icon NVD

Status : Analyzed

Published: 2026-01-19T00:15:47.693

Modified: 2026-02-10T17:02:20.720

Link: CVE-2025-15539

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-01-19T09:19:16Z

Weaknesses