# CVE-2026-77554: Ubiquiti UniFi Talk command injection

Source: https://junglewise.ai/threats/cve-2026-77554-ubiquiti-unifi-talk-command-injection  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-08-26. Updated: 2026-09-25  
License: CC BY 4.0 with a link back

CVE-2026-77554 · Severity: critical · CVSS 10 · Published 2026-08-26

UniFi Talk is a communication application used within Ubiquiti networks. A critical vulnerability allows an attacker with network access to inject arbitrary commands that execute on the host device, potentially compromising the entire system and any data processed by the application.

Vendors: [Ubiquiti](https://junglewise.ai/threats/vendors/ubiquiti).

## Quick answers

**Is CVE-2026-77554 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-77554 being exploited in the wild.

**How severe is CVE-2026-77554?** Critical severity, with a CVSS score of 10, published 26 August 2026.

**Which products and versions are affected?** Ubiquiti UniFi Talk.

**Is there a fix for CVE-2026-77554?** 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-2026-77554 attacked?** It is attacked over the network, in a network appliance.

**Am I affected by CVE-2026-77554?** Check whether you run Ubiquiti UniFi Talk. 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 Input Validation vulnerability in the UniFi Talk Application enables Command Injection attacks. The vulnerability requires network access to the affected device but does not require authentication. An attacker can send crafted network packets containing malicious command sequences that bypass input validation filters, resulting in arbitrary command execution with the privileges of the UniFi Talk process. This allows complete compromise of the host system.

## Affected products

- Ubiquiti UniFi Talk

## Timeline

- 2026-08-26: disclosed

## References

- [https://community.ui.com/releases/Security-Advisory-Bulletin-067/fc4a3488-7c43-4628-8bab-f715e96dbfc9](https://community.ui.com/releases/Security-Advisory-Bulletin-067/fc4a3488-7c43-4628-8bab-f715e96dbfc9)