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CVE-2026-4240

MEDIUM

5.3

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.

CVE Details

CVSS v3.1 Score5.3

SeverityMEDIUM

CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Attack VectorNETWORK

ComplexityLOW

Privileges RequiredNONE

User InteractionNONE

Published3/16/2026

Last Modified3/20/2026

Sourcenvd

Honeypot Sightings0

Affected Products

open5gs:open5gs

Weaknesses (CWE)

CWE-404

References

https://github.com/open5gs/open5gs/(cna@vuldb.com)

https://github.com/open5gs/open5gs/commit/80eb484a6ab32968e755e628b70d1a9c64f012ec(cna@vuldb.com)

https://github.com/open5gs/open5gs/issues/4343(cna@vuldb.com)

https://github.com/open5gs/open5gs/issues/4343#issue-4021871895(cna@vuldb.com)

https://github.com/open5gs/open5gs/releases/tag/v2.7.7(cna@vuldb.com)

https://vuldb.com/?ctiid.351182(cna@vuldb.com)

https://vuldb.com/?id.351182(cna@vuldb.com)

https://vuldb.com/?submit.771361(cna@vuldb.com)

IOC Correlations

No correlations recorded

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