High 7.5Published Mar 16, 2026

CVE-2026-4240A vulnerability was determined in Open5GS up to 2.7.6.

Updated under an hour ago (2026-10-19 08:50 UTC)

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No exploitation reported and no EPSS estimate yet.

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Every CVE for open5gs

Exploited in the last 30 days

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: 7.5 HIGH (v3.1, NVD)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
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: Not given
NVD analysis: Analyzed
Record last updated: Jun 17, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

open5gs open5gs open5gs:open5gs	before 2.7.7	NVD

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

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.