CVE-2026-77548: CWE-20 Improper input validation in Ubiquiti Inc UniFi Protect Application
Description
CVE-2026-77548 is a critical Improper Input Validation vulnerability in the Ubiquiti Inc UniFi Protect Application. It allows a malicious actor with network access and low privileges to perform command injection on the host device. The vulnerability has a CVSS score of 9.9, indicating severe impact on confidentiality, integrity, and availability. No patch or official remediation has been confirmed yet.
CVSS v3.1
Score 9.9critical
Affected software
Ubiquiti Inc
UniFi Protect Application
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-77548) in the UniFi Protect Application arises from improper input validation (CWE-20). An attacker with network access and low privileges can exploit this flaw to inject and execute arbitrary commands on the host device, potentially leading to full system compromise. The CVSS 3.1 vector indicates network attack vector, low attack complexity, low privileges required, no user interaction, and complete impact on confidentiality, integrity, and availability.
Potential Impact
Successful exploitation can lead to complete compromise of the host device running the UniFi Protect Application, including unauthorized command execution, data breach, and service disruption. The critical CVSS score reflects the high severity of this impact.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, restrict network access to the UniFi Protect Application to trusted users only and monitor for suspicious activity related to command execution attempts.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- Ubiquiti
- Date Reserved
- 2026-08-20T20:32:37.794Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6a8ec1fbacd9273b49be1535
Added to database: 08/26/2026, 10:37:47 UTC
Last enriched: 09/09/2026, 18:37:35 UTC
Last updated: 10/10/2026, 18:48:22 UTC
Views: 77
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
External Links
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.