CVE-2026-4240

5.3 MEDIUM
Published: March 16, 2026 Modified: March 20, 2026
View on NVD

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.

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CVSS v3.x Details

0.0 Low Medium High Critical 10.0
Vector String
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

References to Advisories, Solutions, and Tools

Patch Vendor Advisory Exploit Third Party Advisory
https://github.com/open5gs/open5gs/
Source: cna@vuldb.com
Product
https://github.com/open5gs/open5gs/issues/4343
Source: cna@vuldb.com
Issue Tracking Third Party Advisory
https://github.com/open5gs/open5gs/issues/4343#issue-4021871895
Source: cna@vuldb.com
Exploit Issue Tracking Third Party Advisory
https://vuldb.com/?ctiid.351182
Source: cna@vuldb.com
Permissions Required VDB Entry
https://vuldb.com/?id.351182
Source: cna@vuldb.com
Third Party Advisory VDB Entry
https://vuldb.com/?submit.771361
Source: cna@vuldb.com
Exploit Third Party Advisory VDB Entry

8 reference(s) from NVD

Quick Stats

CVSS v3 Score
5.3 / 10.0
EPSS (Exploit Probability)
0.1%
22th percentile
Exploitation Status
Not in CISA KEV

Weaknesses (CWE)

Affected Vendors

open5gs