CVE-2026-85430Public exploitNetwork attack vector

Unauthenticated message injection via source-blind UDP republishing

Published Sep 3, 2026 · Updated Sep 4, 2026

Authentication bypass in themoos essential-moos 10.0.1 and earlier allows remote attackers to inject spoofed messages through pShare. Listener::ListenLoop() binds each input route to every interface, discards sender addresses while reading UDP, deserializes each datagram, and queues it for Share::Impl::Iterate() to repost with the claimed source and community preserved. Any host able to reach a configured UDP input port can alter MOOS community data under a trusted identity; a truncated 14-byte datagram instead terminates pShare and every bridged route.

CVSS severity8.8
High
EPSS probability0.95%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authentication bypass in themoos essential-moos 10.0.1 and earlier allows remote attackers to inject spoofed messages through pShare. Listener::ListenLoop() binds each input route to every interface, discards sender addresses while reading UDP, deserializes each datagram, and queues it for Share::Impl::Iterate() to repost with the claimed source and community preserved. Any host able to reach a configured UDP input port can alter MOOS community data under a trusted identity; a truncated 14-byte datagram instead terminates pShare and every bridged route.

The record

CVE
CVE-2026-85430
Published
Sep 3, 2026
Updated
Sep 4, 2026
Vendor
themoos
Product
essential-moos
Classifications
CWE-345, CAPEC-148, T1565.002
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 3, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 4, 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 <=10.0.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

themoos · essential-moosversion=0 <=10.0.1

Published CVSS scores

8.8VulnCheckCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N
9.1CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/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.

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 exploitPublished

Weakness, pattern, technique

CWE-345Insufficient Verification of Data Authenticity
CAPEC-148Content Spoofing
T1565.002Transmitted Data Manipulation

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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