VulnerabilityAnalyzed
CVE-2026-4240
A vulnerability was determined in Open5GS up to 2.7.6.
MEDIUM 5.5EPSS 0.53%
Does this matter?
Lower severity and a low EPSS score (0.53%). Track it; it rarely justifies an emergency change on its own.
Description
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
- 5.5 MEDIUMCVSS: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/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/M
- EPSS
- 0.53% probability · 43th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-404
- Affected
- open5gs/open5gs
- Source
- cna@vuldb.com
References
- https://github.com/open5gs/open5gs/Product
- https://github.com/open5gs/open5gs/commit/80eb484a6ab32968e755e628b70d1a9c64f012ecPatch
- https://github.com/open5gs/open5gs/issues/4343Issue Tracking, Third Party Advisory
- https://github.com/open5gs/open5gs/issues/4343#issue-4021871895Exploit, Issue Tracking, Third Party Advisory
- https://github.com/open5gs/open5gs/releases/tag/v2.7.7Release Notes
- https://vuldb.com/?ctiid.351182Permissions Required, VDB Entry
- https://vuldb.com/?id.351182Third Party Advisory, VDB Entry
- https://vuldb.com/?submit.771361Exploit, Third Party Advisory, VDB Entry
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.