CVE-2026-85431Network attack vector

Arbitrary variable injection via unauthenticated UDP packets

Published Sep 3, 2026 · Updated Sep 4, 2026

UDP packet injection in pMOOSBridge in themoos essential-moos 10.0.1 and earlier allows remote attackers to write arbitrary MOOS variables. CMOOSUDPLink::ListenLoop() receives datagrams through iRecieveMessage(), which discards sender addresses, then deserializes them for CMOOSBridge::MailUDP() to post locally. The UDPListen configuration exposes the port; a forged nonlocal community name bypasses the loop guard and permits unauthenticated command-state changes.

CVSS severity8.7
High
EPSS probability1.90%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

UDP packet injection in pMOOSBridge in themoos essential-moos 10.0.1 and earlier allows remote attackers to write arbitrary MOOS variables. CMOOSUDPLink::ListenLoop() receives datagrams through iRecieveMessage(), which discards sender addresses, then deserializes them for CMOOSBridge::MailUDP() to post locally. The UDPListen configuration exposes the port; a forged nonlocal community name bypasses the loop guard and permits unauthenticated command-state changes.

The record

CVE
CVE-2026-85431
Published
Sep 3, 2026
Updated
Sep 4, 2026
Vendor
themoos
Product
essential-moos
Classifications
CWE-345, 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

8.7VulnCheckCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N
7.5VulnCheckCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A: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-345Insufficient Verification of Data Authenticity
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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