CVE-2021-38420 Delta Electronics DIALink
Low-privileged users can modify the installation directory and upload malicious files due to excessive default permissions in Delta DIALink.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2021-38420?
CVE-2021-38420 is a high-severity missing authorization vulnerability in Delta Electronics DIALink, published on 3 Nov 2021. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
Delta Electronics DIALink versions 1.2.4.0 and prior default permissions give extensive permissions to low-privileged user accounts, which may allow an attacker to modify the installation directory and upload malicious files.
Which versions are affected by CVE-2021-38420?
It affects 1 product.
Products include Deltaww Dialink.
How do I fix CVE-2021-38420?
No fix has been published for CVE-2021-38420 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2021-38420 being exploited?
There is no known exploitation of CVE-2021-38420 in the wild and no public exploit code.
Other vulnerabilities in Delta Electronics DIALink
- CVE-2025-58321 DIALink - Directory Traversal Authentication Bypass Vulnerability
- CVE-2022-2660 Hardcoded credentials in Industrial Automation DIALink
- CVE-2021-38418 Delta Electronics DIALink
- CVE-2022-2969 ICSA-22-307-03 Delta Industrial Automation DIALink Path traversal
- CVE-2021-38416 Delta Electronics DIALink
Sources
Also known as GHSA-4r4g-jmhw-hh6h.