CVE
Shenzhen Cudy TR3000 root code execution via VPN config mass assignment
Only affects Cudy TR3000 1.0 firmware before 2.5.42. Fixed in firmware 2.5.42.
Written by anthropic/claude-haiku-5.5 from the sources below. Verify against them.
CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
- Exploited
- No known exploitation
- Fix
- Fixed in 2.5.42
- Who is exposed
- Specific setups only
Do first: Check whether your setup matches what the bug needs. Cudy TR3000 1.0 firmware before 2.5.42
- Last modified
- Whether it needs action now or is a reference record, by fixed rules, with why. Last checked is when cve.now last re-read it.What do these mean? →
- Reference
- Last checked
- FIRST's estimate of the chance attackers exploit it in the next 30 days, updated daily.What do these mean? →
- 0.38% · 32nd percentile
- A 0-100 score for how much a CVE matters across the industry: exploitation, exposure, how widely the software is used, severity and whether a fix exists.What do these mean? →
- 17/100 · provisional
- How many real-world setups can hit the bug, from the vendor's advisory and CISA data. It does not know your setup.What do these mean? →
- Specific setups only
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
Summary
The Cudy TR3000 has a flaw in its vpn.set_conf App RPC method that lets a logged-in administrator, reached over the network, inject arbitrary OpenVPN server options. An attacker with administrator access can use this to set a malicious up option that runs shell commands as root.
Original description
Cudy TR3000 before 2.5.42 contains a mass assignment vulnerability in the vpn.set_conf App RPC method that allows authenticated administrators to inject arbitrary OpenVPN server options. Attackers can set enabled=1 and a malicious up option in the openvpns object, which the openvpn-hotplug wrapper executes via /bin/sh as root.
Who should check
Teams and administrators running Cudy TR3000 1.0 routers on firmware before 2.5.42.
“Affecting TR3000 1.0 >= 0, < 2.5.42”
cve.now Index
- Exploitation?/40Unknown. No CISA SSVC exploitation rating yet
- Exposure8/25Specific setups only, reachable over the network
- Reach?/20Unknown. No tracked technology or package matched
- Severity8.6/10CVSS 8.6
- No patch0/5No signal
What would change the score
- Would score about 67 if added to CISA KEV
- Would score about 62 if CISA's SSVC rates exploitation active
- Would score about 24 if CISA's SSVC rates it automatable
What to do
Check whether your setup matches what the bug needs.
Cudy TR3000 1.0 firmware before 2.5.42Upgrade to a fixed version: 2.5.42.
Check your systems with an agent
Paste this into a coding or ops agent. It checks your systems read-only and reports a table per asset.
Check whether my systems are affected by CVE-2026-129101 (Cudy TR3000 before 2.5.42 Authenticated RCE via vpn.set_conf Mass Assignment), using the cve.now data below.
Rules: work read-only. Do not run exploit code, proof-of-concept scripts or scanners that send attack payloads, and do not change any configuration, package, image or deployment. Report findings only.
What cve.now has for CVE-2026-129101 (entry last updated 2026-11-13):
Affected:
- Shenzhen Cudy Technology Co., Ltd. TR3000 1.0: fixed in 2.5.42
Fixed versions: 2.5.42.
Conditions (all must be true for the bug to be hit):
- Cudy TR3000 1.0 firmware before 2.5.42 (source: https://www.vulncheck.com/advisories/cudy-tr3000-before-2.5.42-authenticated-rce-via-vpn-set-conf-mass-assignment)
Setup: unknown whether the bug needs a non-default feature or setting. Check the advisory.
Attacker needs: network access, high-privilege login, no user action.
CISA KEV: CVE-2026-129101 is not listed as of cve.now's last read.
This KEV status is for CVE-2026-129101 only. If you also check another CVE, look up its own KEV status; never assume it from this one.
How to check:
- Installed software: check what is actually running, not what a repo declares. Read the version from each host, container image and Kubernetes node (the binary's version output, the OS package database, image layers), and check whether the conditions above hold there. Distribution packages may carry a backported fix under an older version number; confirm against the distribution's own advisory.
Verify against the linked advisories before concluding, and cite the date you read each one:
- https://d1jvyy13vm72kv.cloudfront.net/device/upgrade/m_upgrade_TR3000_256MB_Flash-R103-2.5.42-20261103-160202-sysupgrade_82672.zip
- https://www.cudy.com/en-us/pages/download-center/tr3000-1-0
- https://www.vulncheck.com/advisories/cudy-tr3000-before-2.5.42-authenticated-rce-via-vpn-set-conf-mass-assignment
Do not conclude an asset is unaffected unless you checked it and the evidence covers both its version and the conditions above. If you could not check something, mark it unknown and say what is missing.
Report a table with one row per asset and these columns: Asset | Version or build | Status (affected, fixed, not applicable, unknown) | Compensating controls | Exposure (internet-facing, internal, none) | Evidence | Next action.
Entry: https://cve.now/CVE-2026-129101
For follow-up questions, use the cve.now MCP server at https://mcp.cve.now/mcp (no authentication), for example execute with name cve.get and arguments {"id": "CVE-2026-129101"}.Timeline
- CVE published
- First seen by cve.now
Affected versions
- Shenzhen Cudy Technology Co., Ltd. TR3000 1.0
fixed in 2.5.42
Evidence 5
Vendor advisory · 1
Establishes: Affected and fixed versions.
- Link
CVE record · 2
Establishes: The identifier and description.
- Record
- Record
Corrections
None so far.
Something wrong on this page? Report an error. Every fix is listed here.
Questions about CVE-2026-129101
Is CVE-2026-129101 being exploited?
It is not in CISA's Known Exploited Vulnerabilities catalog, and CISA's SSVC assessment does not mark exploitation as active. That does not mean it has not been attacked: vendors and researchers can report attacks before CISA lists them. No public exploit code is tracked.Source: cve.now feed data
What does this mean?
An authenticated user can make the router's vpn.set_conf function accept a malicious OpenVPN up option, which the router runs through /bin/sh as root. This gives remote code execution as root on the router.Source: vulncheck.com
Which versions are affected by CVE-2026-129101?
TR3000 1.0: before 2.5.42.Source: cve.now feed data
Am I affected, and how do I check?
Cudy TR3000 1.0 firmware versions before 2.5.42 are affected. To check a router, compare its firmware version with 2.5.42.Source: vulncheck.com
How do I fix CVE-2026-129101?
Update the TR3000 1.0 firmware to 2.5.42. No other patch or workaround is named in the sources.Source: vulncheck.com