CVE-2026-75490
Cudy TR3000 before 2.5.42 Unauthenticated RCE via mDNS Automesh Broker Adoption
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.
Fixes and workarounds
Fix
The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches.
Source: CNA: VulnCheckAffected products and versions
| Product | Versions | Authority |
|---|---|---|
| TR3000 1.0 Shenzhen Cudy Technology Co., Ltd. |
≥ 0; < 2.5.42 (affected, semver) 2.5.42 (unaffected, semver) Other versions: unaffected |
CNA: VulnCheck |
Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.
CVSS assessments
| Version / score | Vector | Authority |
|---|---|---|
| 4.0 / 7.7 high |
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 | CNA: VulnCheck |
| 3.1 / 7.5 high |
CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H | CNA: VulnCheck |
Exploit evidence
No exploit evidence in collected sources. This is not proof of no exploitation.
References
- https://www.cudy.com/en-us/pages/download-center/tr3000-1-0CNA: VulnCheck · release-notes
- https://d1jvyy13vm72kv.cloudfront.net/device/upgrade/m_upgrade_TR3000_256MB_Flash-R103-2.5.42-20261103-160202-sysupgrade_82672.zipCNA: VulnCheck · patch
- https://www.vulncheck.com/advisories/cudy-tr3000-before-2.5.42-unauthenticated-rce-via-mdns-automesh-broker-adoptionCNA: VulnCheck · third-party-advisory
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