CVE-2026-4240Open5GS CCA smf_s6b_sta_cb denial of service
Updated under an hour ago ()
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It affects n/a Open5GS. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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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
- 5.3 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:P/RL:O/RC:C
- Weakness (CWE)
- CWE-404
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- VulDB
- NVD analysis
- Analyzed
- Record last updated
- Mar 16, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
n/a Open5GS open5gs:open5gs | 2.7.0; 2.7.1; 2.7.2; 2.7.3; 2.7.4; 2.7.5; 2.7.6; 2.7.7 not affected | CNA record |
open5gs open5gs open5gs:open5gs | before 2.7.7 | NVD |
References
- https://vuldb.com/?id.351182vdb-entry, technical-description, third-party-advisory
- https://vuldb.com/?ctiid.351182signature, permissions-required, vdb-entry
- https://vuldb.com/?submit.771361third-party-advisory, exploit, vdb-entry
- 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/commit/80eb484a6ab32968e755e628b70d1a9c64f012ecpatch
- https://github.com/open5gs/open5gs/releases/tag/v2.7.7patch, release-notes
- https://github.com/open5gs/open5gs/product
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.