CVE-2026-37220Public exploitNetwork attack vector

Remote RIC crash via premature SCTP disconnect

Published Jun 1, 2026 · Updated Jun 1, 2026

Reachable assertion in EURECOM FlexRIC 2.0.0 allows remote attackers to crash the near-RT RIC through an early SCTP disconnect. The notification_handle_ric() cleanup path removes an association from the E2-node map without confirming that E2 setup created the mapping, so map extraction asserts on a missing key. Completing an SCTP handshake on port 36421 and disconnecting before any E2AP message terminates the process and interrupts connected E2 nodes and xApps.

CVSS severity7.5
High
EPSS probability0.35%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Reachable assertion in EURECOM FlexRIC 2.0.0 allows remote attackers to crash the near-RT RIC through an early SCTP disconnect. The notification_handle_ric() cleanup path removes an association from the E2-node map without confirming that E2 setup created the mapping, so map extraction asserts on a missing key. Completing an SCTP handshake on port 36421 and disconnecting before any E2AP message terminates the process and interrupts connected E2 nodes and xApps.

The record

CVE
CVE-2026-37220
Published
Jun 1, 2026
Updated
Jun 1, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-617, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 1, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 1, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

7.5CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-617Reachable Assertion
T1499.004Application or System Exploitation

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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