CVE-2019-20085 TVT NVMS-1000: file path flaw
In plain words: The program can be tricked into reading or writing files outside the folder it should stay in. Leaks files such as passwords and settings, or overwrites important ones.
Confirmed exploited by CISA on · US federal patch deadline May 3, 2022
What to do
- Install TVT's security update for NVMS-1000. If no update exists, follow the vendor's workaround or stop using the product until one ships.
- Patch edge devices first — attackers often start scanning for them within hours of a fix.
- Never expose the device's admin page to the internet.
- After patching a device that was exposed, follow the vendor's compromise checks, end active sessions and change passwords.
Who is affected
Work IT. Aimed mostly at company systems — you are affected through the companies you use, not your own phone.
What's at risk: They face the internet and guard the whole network, so a flaw here can hand attackers a way in — and these devices usually run no antivirus, so break-ins go unnoticed.
The details
- Official name
- TVT NVMS-1000 Directory Traversal Vulnerability
- Product
- TVT NVMS-1000
- CISA description
- TVT devices utilizing NVMS-1000 software contain a directory traversal vulnerability via GET /.. requests.
- Type of flaw
- File path flaw (CWE-22)
- Confirmed exploited
- Nov 3, 2021
- US federal patch deadline
- May 3, 2022
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Answering about CVE-2019-20085 ·
Questions about CVE-2019-20085
Is CVE-2019-20085 being exploited?
Yes. CISA added CVE-2019-20085 to its Known Exploited Vulnerabilities catalog on Nov 3, 2021, which means there is reliable evidence of real-world attacks.
How do I fix CVE-2019-20085?
Install TVT's security update for NVMS-1000. If no update exists, follow the vendor's workaround or stop using the product until one ships. Patch edge devices first — attackers often start scanning for them within hours of a fix.
Am I affected by CVE-2019-20085?
Only if you use TVT NVMS-1000. Aimed mostly at company systems — you are affected through the companies you use, not your own phone.