CVE-2026-4988 | THREATINT

Description

A security flaw has been discovered in Open5GS 2.7.6. This issue affects the function smf_gx_cca_cb/smf_gy_cca_cb/smf_s6b of the component CCA Message Handler. The manipulation results in denial of service. The attack may be launched remotely. Attacks of this nature are highly complex. The exploitability is assessed as difficult. The exploit has been released to the public and may be used for attacks.

PUBLISHED Reserved 2026-03-27 | Published 2026-03-27 | Updated 2026-03-30 | Assigner VulDB

MEDIUM: 6.3CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P

LOW: 3.7CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L/E:P/RL:X/RC:R

LOW: 3.7CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L/E:P/RL:X/RC:R

2.6AV:N/AC:H/Au:N/C:N/I:N/A:P/E:POC/RL:ND/RC:UR

Problem types

Denial of Service

Timeline

2026-03-27:	Advisory disclosed
2026-03-27:	VulDB entry created
2026-03-27:	VulDB entry last update

Credits

ZiyuLin (VulDB User) reporter

References

vuldb.com/?id.353875 (VDB-353875 | Open5GS CCA Message smf_s6b denial of service) vdb-entry technical-description

vuldb.com/?ctiid.353875 (VDB-353875 | CTI Indicators (IOB, IOC, TTP, IOA)) signature permissions-required

vuldb.com/?submit.771349 (Submit #771349 | Open5GS SMF v2.7.6 Denial of Service) third-party-advisory

github.com/open5gs/open5gs/issues/4342 issue-tracking

github.com/open5gs/open5gs/issues/4342 exploit issue-tracking

github.com/open5gs/open5gs/ product

cve.org (CVE-2026-4988)

nvd.nist.gov (CVE-2026-4988)

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