CVE-2026-4240
Medium
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.
SeverityMedium
CVSS5.3
Exploit probability—
ProductOpen5gs
PublishedMar 16, 2026
First seenMar 16, 2026
Weakness typeCWE-404CWE-404
How to fix
Update
- open5gs open5gs2.7.7 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| open5gs open5gs | v < 2.7.7 | 2.7.7 |
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