CVE-2026-37231Public exploitNetwork attack vector

Unauthenticated iApp crash via xapp_id truncation

Published Jun 1, 2026 · Updated Jun 1, 2026

Integer truncation in EURECOM FlexRIC 2.0.0 allows remote attackers to crash the iApp through repeated xApp setup requests. The iApp increments a wider xapp_id counter into a narrower E42 setup-response field, allowing wrapped IDs to collide with existing registry keys. No authentication or user interaction is required; after roughly 65,530 valid SCTP requests to port 36422, the uniqueness assertion aborts iApp and interrupts xApp registration.

CVSS severity7.5
High
EPSS probability0.49%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Integer truncation in EURECOM FlexRIC 2.0.0 allows remote attackers to crash the iApp through repeated xApp setup requests. The iApp increments a wider xapp_id counter into a narrower E42 setup-response field, allowing wrapped IDs to collide with existing registry keys. No authentication or user interaction is required; after roughly 65,530 valid SCTP requests to port 36422, the uniqueness assertion aborts iApp and interrupts xApp registration.

The record

CVE
CVE-2026-37231
Published
Jun 1, 2026
Updated
Jun 1, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
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

7.5Researcher advisoryCVSS: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

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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