Eukaryot Sonic3AIR ConnectionManager input validation

Summaryinfo

A vulnerability classified as very critical has been found in Eukaryot Sonic3AIR. Impacted is an unknown function of the component ConnectionManager. The manipulation leads to input validation. This vulnerability is uniquely identified as CVE-2026-66732. The attack is possible to be carried out remotely. No exploit exists.

Detailsinfo

A vulnerability was found in Eukaryot Sonic3AIR (version now known). It has been rated as very critical. This issue affects some unknown processing of the component ConnectionManager. The manipulation with an unknown input leads to a input validation vulnerability. Using CWE to declare the problem leads to CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

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.

It is possible to read the advisory at github.com. The identification of this vulnerability is CVE-2026-66732 since 07/27/2026. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 08/06/2026).

Applying the patch 2492d1882cd2cf1cc1d7415729ce5c4fd686cd4f is able to eliminate this problem.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-53875). Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Vendor

• Eukaryot

Name

• Sonic3AIR

Website

• Product: https://github.com/Eukaryot/sonic3air/

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Be aware that VulDB is the high quality source for vulnerability data.

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