CVE-2025-66786Network attack vector

Denial of service via malicious SBI JSON

Published Jan 7, 2026 · Updated Jan 7, 2026

Improper input validation in OpenAirInterface CN5G AMF 2.0.1 and earlier allows remote attackers to interrupt service through SBI JSON requests. Public records identify the SBI JSON request-processing path but do not disclose the function or the incorrect operation performed on malicious data. No authentication or user interaction is required, and the reported consequence is limited to availability; the exact failure mode is undisclosed.

CVSS severity7.5
High
EPSS probability0.36%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper input validation in OpenAirInterface CN5G AMF 2.0.1 and earlier allows remote attackers to interrupt service through SBI JSON requests. Public records identify the SBI JSON request-processing path but do not disclose the function or the incorrect operation performed on malicious data. No authentication or user interaction is required, and the reported consequence is limited to availability; the exact failure mode is undisclosed.

The record

CVE
CVE-2025-66786
Published
Jan 7, 2026
Updated
Jan 7, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-20, T1499
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 7, 2026CVE publishedPublication date reported by the CVE source.
  2. Jan 7, 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 exploitUnconfirmed

Weakness, pattern, technique

CWE-20Improper Input Validation
T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

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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