Quick answers
- Is CVE-2026-77553 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-77553 being exploited in the wild.
- How severe is CVE-2026-77553?
- Critical severity, with a CVSS score of 9.9, published 26 August 2026.
- Which products and versions are affected?
- Ubiquiti UniFi Access.
- Is there a fix for CVE-2026-77553?
- 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-2026-77553 attacked?
- It is attacked over the network or with local access, in a network appliance.
- Am I affected by CVE-2026-77553?
- Check whether you run Ubiquiti UniFi Access. 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
An improper access control vulnerability in the UniFi Access application allows privilege escalation on the host device. The vulnerability requires network access and low-level privileges on the system, but does not require authentication bypass. A successful exploitation grants an attacker elevated privileges on the affected host, potentially leading to full administrative control. Patch availability details are not confirmed in the provided advisory excerpt.
Affected products
- Ubiquiti UniFi Access
Timeline
- 2026-08-26: disclosed