Is CVE-2026-37220 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-37220 being exploited in the wild.

How severe is CVE-2026-37220?

Informational severity, with a CVSS score of 7.5, published 1 June 2026.

Which products and versions are affected?

EURECOM FlexRIC v2.0.0 through commit 6a595d8b.

Is there a fix for CVE-2026-37220?

No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

How is CVE-2026-37220 attacked?

It is attacked over the network, in a hosted service.

Am I affected by CVE-2026-37220?

Check whether you run EURECOM FlexRIC at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-37220: EURECOM FlexRIC reachable assertion in SCTP notification handler

CVE-2026-37220 · Severity: info · CVSS 7.5 · Published 2026-06-01

FlexRIC, a controller used in Open RAN cellular networks to manage radio resources, is vulnerable to a remote crash. An attacker can cause the controller to shut down by initiating and then immediately closing a network connection before the standard setup process completes. This results in a denial of service, disconnecting cellular base stations and disrupting network operations.

Technologies: EURECOM FlexRIC. Vendors: EURECOM.

Quick answers

Is CVE-2026-37220 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-37220 being exploited in the wild.
How severe is CVE-2026-37220?: Informational severity, with a CVSS score of 7.5, published 1 June 2026.
Which products and versions are affected?: EURECOM FlexRIC v2.0.0 through commit 6a595d8b.
Is there a fix for CVE-2026-37220?: No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2026-37220 attacked?: It is attacked over the network, in a hosted service.
Am I affected by CVE-2026-37220?: Check whether you run EURECOM FlexRIC at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

A reachable assertion (CWE-617) exists in the FlexRIC near-RT RIC component within the SCTP shutdown notification handler. The vulnerability is located in src/ric/not_handler_ric.c in the notification_handle_ric() function. The software assumes a mapping between an SCTP association and an E2 node always exists during the cleanup path and enforces this via an assert() statement. A remote, unauthenticated attacker can trigger this assertion by completing an SCTP handshake on port 36421 and immediately disconnecting without sending any E2AP messages. This causes the RIC process to abort, leading to a denial of service for all connected E2 nodes and xApps.

Affected products

EURECOM FlexRIC v2.0.0 through commit 6a595d8b

Timeline

2026-06-01: disclosed
2026-06-01: advisory

References

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