CVE-2026-7535
Open5GS transfer-update denial of service
- State
- Published
- Severity
- 5.3 Medium
- Published
- May 1, 2026
- Updated
- May 4, 2026
- Reserved
- Apr 30, 2026
Description
A vulnerability was found in Open5GS up to 2.7.7. This affects the function amf_namf_comm_handle_registration_status_update_request in the library /lib/app/ogs-init.c of the file /namf-comm/v1/ue-contexts/{ueContextId}/transfer-update. Performing a manipulation of the argument ueContextId results in denial of service. The attack can be initiated remotely. The exploit has been made public and could be used. The project was informed of the problem early through an issue report but has not responded yet.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 5.3 Medium | CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P | VulDB |
| 3.1 | 4.3 Medium | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:X/RC:R | VulDB |
| 3.0 | 4.3 Medium | CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:X/RC:R | VulDB |
| 2.0 | 4.0 Medium | AV:N/AC:L/Au:S/C:N/I:N/A:P/E:POC/RL:ND/RC:UR | VulDB |
Weaknesses
- CWE-404 Denial of Service
Affected Products
| Product | Versions |
|---|---|
Open5GSn/a |
|
References
- VDB-360352 | Open5GS transfer-update denial of servicevdb-entrytechnical-description
- VDB-360352 | CTI Indicators (IOB, IOC, TTP, IOA)signaturepermissions-required
- Submit #804291 | Open5GS AMF V2.7.7 Denial of Servicethird-party-advisory
- Submit #804303 | Open5GS AMF v2.7.7 Denial of Service (Duplicate)third-party-advisory
- https://github.com/open5gs/open5gs/issues/4399exploitissue-tracking
- https://github.com/open5gs/open5gs/product
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