CVE-2020-25079 D-Link DCS-2530L and DCS-2670L Devices: command or code injection
In plain words: The program treats text it receives as instructions instead of plain data. The attacker can run commands on the machine — often the whole device is taken over.
Confirmed exploited by CISA on · US federal patch deadline Aug 26, 2025
What to do
- Install D-Link's security update for DCS-2530L and DCS-2670L Devices. If no update exists, follow the vendor's workaround or stop using the product until one ships.
- Turn on automatic firmware updates and replace gear the maker no longer supports.
- Change default passwords and switch off remote administration and features you do not use.
- Do not put storage boxes or cameras directly on the internet — use the maker's app or a VPN.
Who is affected
Could reach you. This one is aimed at devices or apps of the kind people own.
What's at risk: Taken over in bulk to join botnets, used to watch your traffic, or — for storage boxes — locked by ransomware.
The details
- Official name
- D-Link DCS-2530L and DCS-2670L Command Injection Vulnerability
- Product
- D-Link DCS-2530L and DCS-2670L Devices
- CISA description
- D-Link DCS-2530L and DCS-2670L devices contains a command injection vulnerability in the cgi-bin/ddns_enc.cgi. The impacted products could be end-of-life (EoL) and/or end-of-service (EoS). Users should discontinue product utilization.
- Type of flaw
- Command or code injection (CWE-77)
- Confirmed exploited
- Aug 5, 2025
- US federal patch deadline
- Aug 26, 2025
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Answering about CVE-2020-25079 ·
Questions about CVE-2020-25079
Is CVE-2020-25079 being exploited?
Yes. CISA added CVE-2020-25079 to its Known Exploited Vulnerabilities catalog on Aug 5, 2025, which means there is reliable evidence of real-world attacks.
How do I fix CVE-2020-25079?
Install D-Link's security update for DCS-2530L and DCS-2670L Devices. If no update exists, follow the vendor's workaround or stop using the product until one ships. Turn on automatic firmware updates and replace gear the maker no longer supports.
Am I affected by CVE-2020-25079?
Only if you use D-Link DCS-2530L and DCS-2670L Devices. This one is aimed at devices or apps of the kind people own.