CVE-2026-66732Network attack vector

Session packet forgery via missing peer validation

Published Aug 6, 2026 · Updated Aug 6, 2026

Origin validation error in Eukaryot Sonic 3 AIR 26.03.28.0 and earlier allows man-in-the-middle attackers to forge session packets. ConnectionManager resolves an established session from a two-byte local handle but accepts UDP datagrams without matching the sender address to the registered peer. Exploitation requires observing cleartext UDP traffic and permits session termination, channel-message alteration, and forged responses.

CVSS severity8.3
High
EPSS probability0.12%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Origin validation error in Eukaryot Sonic 3 AIR 26.03.28.0 and earlier allows man-in-the-middle attackers to forge session packets. ConnectionManager resolves an established session from a two-byte local handle but accepts UDP datagrams without matching the sender address to the registered peer. Exploitation requires observing cleartext UDP traffic and permits session termination, channel-message alteration, and forged responses.

The record

CVE
CVE-2026-66732
Published
Aug 6, 2026
Updated
Aug 6, 2026
Vendor
Eukaryot
Product
Sonic 3 A.I.R.
Classifications
CWE-346, T1565.002
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 6, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 6, 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?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <=26.03.28.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Eukaryot · Sonic 3 A.I.R.version=0 <=26.03.28.0

Published CVSS scores

5.9VulnCheckCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
8.3VulnCheckCVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N

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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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-346Origin Validation Error
T1565.002Transmitted Data Manipulation

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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