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CVE-2026-4240

Open5GS CCA smf_s6b_sta_cb denial of service

CVSS 6.9 MEDIUMEPSS 0.5%CWE-404
Vexday Risk Score
13Low
SSVC decision (CISA)
Track
No exploitation signal → monitor
CVSS 6.9EPSS 0.5%KEV nãoPoC —Nuclei —Metasploit —Patch referenciado
Lifecycle
16 Mar 2026Published on NVD
Recommendation: Monitor — no exploitation signal at the moment.
A vulnerability was determined in Open5GS up to 2.7.6. The affected element is the function smf_gx_cca_cb/smf_gy_cca_cb/smf_s6b_aaa_cb/smf_s6b_sta_cb of the component CCA Handler. This manipulation causes denial of service. The attack can be initiated remotely. The exploit has been publicly disclosed and may be utilized. Upgrading to version 2.7.7 is sufficient to fix this issue. Patch name: 80eb484a6ab32968e755e628b70d1a9c64f012ec. Upgrading the affected component is recommended.
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
Affected products
n/a · Open5GS

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References
https://github.com/open5gs/open5gs/https://github.com/open5gs/open5gs/commit/80eb484a6ab32968e755e628b70d1a9c64f012echttps://github.com/open5gs/open5gs/issues/4343https://github.com/open5gs/open5gs/issues/4343#issue-4021871895https://github.com/open5gs/open5gs/releases/tag/v2.7.7https://vuldb.com/?ctiid.351182https://vuldb.com/?id.351182https://vuldb.com/?submit.771361