CVE-2026-77543 Command injection in UniFi Access Application
A low-privileged network attacker can execute arbitrary commands on the host via improper input validation in the UniFi Access Application.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-77543?
CVE-2026-77543 is a critical command injection vulnerability in Ubiquiti Inc UniFi Access Application, published on 26 Aug 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
A malicious actor with access to the network and low privileges could exploit an Improper Input Validation vulnerability found in UniFi Access Application to execute a Command Injection on the host device.
Weakness: CWE-20
Which versions are affected by CVE-2026-77543?
How do I fix CVE-2026-77543?
No fix has been published for CVE-2026-77543 yet. Limit exposure of the affected software until one is available.
Upgrade, and pass arguments to programs as a list instead of through a shell. More about Command injection.
Is CVE-2026-77543 being exploited?
There is no known exploitation of CVE-2026-77543 in the wild and no public exploit code.
Sources
Also known as GHSA-xf5j-wgpj-6w8j.