Quick answers
- Is CVE-2026-77545 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-77545 being exploited in the wild.
- How severe is CVE-2026-77545?
- Critical severity, with a CVSS score of 9, published 26 August 2026.
- Which products and versions are affected?
- Ubiquiti UniFi OS certain versions.
- Is there a fix for CVE-2026-77545?
- No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
- How is CVE-2026-77545 attacked?
- It is attacked over the network, in a network appliance.
- Am I affected by CVE-2026-77545?
- Check whether you run Ubiquiti UniFi OS at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Technical details
The vulnerability is a privilege escalation flaw stemming from active debug code within UniFi OS that was not properly removed or disabled in production builds. The issue requires network access and low-level privileges to exploit, making it exploitable by a user with a basic account or via a compromised low-privileged service. Under certain conditions, an attacker can leverage this debug functionality to bypass authorization controls and escalate privileges to administrative level. The affected versions are specific builds of UniFi OS; patches are available from Ubiquiti through their security advisory.
Affected products
- Ubiquiti UniFi OS certain versions
Timeline
- 2026-08-26: disclosed