---
id: CVE-2026-66732
title: Sonic 3 A.I.R
summary: >-
  Sonic 3 A.I.R. before commit 2492d18 contains a missing source address
  validation vulnerability in ConnectionManager where established connections
  are resolved by a two-byte local connection handle alone without verifying
  that the datagr…
severity: medium
cvss: 5.9
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N'
cwe:
  - CWE-346
published: '2026-08-06'
updated: '2026-09-24'
sourceUpdated: '2026-09-24T20:43:32.537'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-66732'
references:
  - url: >-
      https://github.com/Eukaryot/sonic3air/commit/2492d1882cd2cf1cc1d7415729ce5c4fd686cd4f
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/sonic-3-a-i-r-missing-source-address-validation-in-connectionmanager
    label: disclosure@vulncheck.com
tags:
  - nvd
epss: 0.00172
epssPercentile: 0.05768
ingestedAt: '2026-09-24T20:51:40.183Z'
---

## Overview

Sonic 3 A.I.R. before commit 2492d18 contains a missing source address validation vulnerability in ConnectionManager where established connections are resolved by a two-byte local connection handle alone without verifying that the datagram source address matches the registered remote address for the connection. An on-path attacker who can observe cleartext UDP traffic can inject arbitrary packets into any established session by forging the two-byte connection identifier, enabling session termination via TerminateConnectionPacket, arbitrary channel message forgery, and forged request responses without requiring IP address spoofing.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.