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CVE-2026-85436

MOOS essential-moos through 10.0.1 pMOOSBridge Heap Corruption via Negative UDP Length

HIGH
7.5
CVSS Score
Published: September 3, 2026 at 10:38 PM UTC
Updated: October 14, 2026 at 11:27 PM UTC
1 product affected across 1 vendorEssential Moos

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Severity
HIGH7.5
Exploit prediction
EPSS 2%
SSVC
No known exploit

Description

MOOS essential-moos through 10.0.1 contains a buffer overflow vulnerability in CMOOSUDPLink::ReadPktFromArray() that allows remote attackers to corrupt heap memory by sending UDP datagrams with negative declared lengths. Attackers can send crafted UDP packets to the configured UDPListen port to trigger an oversized memcpy operation that writes past the destination buffer, causing heap corruption and denial of service.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

References (5)

Issue TrackingPatch
Source: cverecord
https://github.com/themoos/essential-moos/pull/21
PatchIssue Tracking
Source: cverecord
https://github.com/themoos/essential-moos/commit/613175fcf63fb9c6c5329c4ec57c2d18588b33e2
Product
Source: cverecord
https://github.com/themoos/essential-moos
Technical DescriptionIssue TrackingPatch
Source: cverecord
https://github.com/themoos/essential-moos/blob/b897ea86dba8b61412dc48ac0cfb5ff34cdaf5f6/Essentials/pMOOSBridge/MOOSUDPLink.cpp#L171
Third Party Advisory
Source: cverecord
https://www.vulncheck.com/advisories/moos-essential-moos-through-10.0.1-pmoosbridge-heap-corruption-via-negative-udp-length

SSVC — Action Prioritization

SSVCNo known exploitAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.5HIGHVulnCheck
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusANALYZED
CWE
CWE-191

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