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CVE.org (no NVD analysis yet)· CNA VulnCheck

CVE-2026-75490: Cudy TR3000 before 2.5.42 Unauthenticated RCE via mDNS Automesh Broker Adoption

HighCVSS 7.7 · v4.0—No exploit Fix available

Noroxi assessment

Priority: Monitor (action score 30/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Someone on the same network segment can trigger it. No account or password is required. No user action is required. Special conditions such as timing or configuration are required.
  • Fixed version: Shenzhen Cudy Technology Co., Ltd. TR3000 1.0 2.5.42.

Low priority for now. Upgrade to Shenzhen Cudy Technology Co., Ltd. TR3000 1.0 2.5.42 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org

Cudy TR3000 before 2.5.42 contains a remote code execution vulnerability that allows unauthenticated adjacent attackers to run root commands by advertising a rogue automesh controller over mDNS. Attackers on the upstream Ethernet segment can advertise _cudycmagent._tcp records pointing to a malicious MQTT broker, then send commands encrypted with a fixed AES key that router/batchcmd.lua executes as root.

Published
Nov 13, 2026
Updated
Nov 13, 2026
EPSS
—

Report tools

JSON

Action score

30

Monitor

Low priority for now.

CVSS
30 / 40 · 7.7 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · —

CNA vs NVD score

NVD
—
CNA · VulnCheck
7.7
NVD has not scored this yet; the score shown is the CNA’s.

CVSS:4.0/AV:A/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

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When you'll hear from us

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  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

—

Versions reported by the vendor

Affected version ranges reported by the assigning authority (VulnCheck). Independent of NVD's CPE analysis and usually ahead of it.

  • Shenzhen Cudy Technology Co., Ltd. TR3000 1.0

    • 2.5.42not affected
    • before 2.5.42affected · semver

Same product

Other highest-scoring records for the same primary product.

  • CVE-2026-75495Cudy TR3000 before 2.5.42 OS Command Injection via TR-098 User Password Parameter
    36Monitor
  • CVE-2026-75491Cudy TR3000 before 2.5.42 MQTT JWT Authentication Bypass via alg none Tokens
    36Monitor
  • CVE-2026-126953Cudy TR3000 before 2.5.42 OS Command Injection via TR-098 User Username
    36Monitor

Published before and after this one in the same product

  • ← EarlierCVE-2026-75488Nov 13, 2026 · Cudy TR3000 before 2.5.42 Stack Buffer Overflow via CWMP Basic Authorization Builder
    32Monitor
  • ← EarlierCVE-2026-75489Nov 13, 2026 · Cudy TR3000 before 2.5.42 SMT Message Forgery via Probe Request Vendor IE
    24Monitor
  • Later →CVE-2026-75492Nov 13, 2026 · Cudy TR3000 before 2.5.42 Stack Buffer Overflow via stun_client UDP Parser
    34Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
Shenzhen Cudy Technology Co., Ltd. TR3000 1.02.5.42Vendor (CNA)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

  1. Published
  2. Fix recordedsame day
  3. TodayNov 13, 2026same day

Not on record for this CVE: EPSS history · patch commit or PR link · researcher credit · variant or chain candidate · public bounty program.

Technical details

Attack conditions

  • Someone on the same network segment can trigger it.
  • No account or password is required.
  • No user action is required.
  • Special conditions such as timing or configuration are required.

If successful

Confidentiality
Integrity
Availability
Attack vector
Adjacent
Attack complexity
High
Privileges required
None
User interaction
None
Scope
X

Weakness class (CWE)

CWE-306 · Missing Authentication for Critical Function

CVSS vector

CVSS:4.0/AV:A/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

nvd-secondary

Root cause

A function added for development or support ships to production without authentication. It often relies on the assumption that it is “only reachable from the internal network.”

The bug in code

The whole CWE-306 class

A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

Vulnerable

ts
// Added for the support teamapp.post("/maintenance/reset", resetDevice);

Fixed

ts
if (config.maintenanceEnabled) {  app.post(    "/maintenance/reset",    requireSession, requireRole("admin"), resetDevice  );}

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

ATT&CK techniques

—

References

Show all references (2 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

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