Buffer overflow in Open5gs

CVE-2026-2522

A security vulnerability has been detected in Open5GS up to 2.7.6. Impacted is an unknown function of the file /src/mme/esm-build.c of the component MME. The manipulation leads to memory corruption. It is possible to initiate the attack remotely. The exploit has been disclosed publicly and may be used. The project was informed of the problem early through an issue report but has not responded yet.

Vulnerability class: Buffer Overflow

EPSS: 0.005 (42.7th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L.

Affected products

  • Open5gs
  • N/a Open5gs — versions 2.7.0, 2.7.1, 2.7.2

Weakness classification (CWE)

References

  • cna@vuldb.com (technical-description, VDB Entry, Third Party Advisory, vdb-entry)
  • cna@vuldb.com (signature, Permissions Required, permissions-required, VDB Entry)
  • cna@vuldb.com (VDB Entry, Third Party Advisory, third-party-advisory)
  • cna@vuldb.com (issue-tracking, Exploit, Issue Tracking, Vendor Advisory)
  • cna@vuldb.com (issue-tracking, Exploit, exploit, Issue Tracking, Vendor Advisory)
  • cna@vuldb.com (Product, product)

Frequently asked questions

What is CVE-2026-2522?
CVE-2026-2522 is a medium-severity vulnerability in Open5gs, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 5.3/10. Published 2026-02-16.
How severe is CVE-2026-2522?
Medium severity. CVSS v3 base score is 5.3 out of 10.