CVE-2026-21634: Vulnerability in Ubiquiti Inc UniFi Protect Application
CVE-2026-21634 is a vulnerability in Ubiquiti Inc's UniFi Protect Application (version 6.1.79 and earlier) where a malicious actor on an adjacent network can cause a buffer overflow in the discovery protocol, leading to application restarts. This denial-of-service condition affects availability but does not impact confidentiality or integrity. The vulnerability has a CVSS score of 6.5 (medium severity). A fix is available by updating to UniFi Protect Application version 6.2.72 or later.
AI Analysis
Technical Summary
This vulnerability involves a buffer overflow (CWE-119) in the UniFi Protect Application's discovery protocol that can be triggered by an attacker with access to the adjacent network. Exploitation causes the application to restart, resulting in denial of service. The issue affects versions 6.1.79 and earlier. The vendor has released a patched version 6.2.72 that addresses this flaw.
Potential Impact
The vulnerability allows an unauthenticated attacker on the adjacent network to cause the UniFi Protect Application to restart, disrupting service availability. There is no impact on confidentiality or integrity according to the CVSS vector. No known exploits are reported in the wild.
Mitigation Recommendations
Update the UniFi Protect Application to version 6.2.72 or later to remediate this vulnerability. This official fix resolves the buffer overflow issue in the discovery protocol. No additional mitigations are indicated by the vendor.
CVE-2026-21634: Vulnerability in Ubiquiti Inc UniFi Protect Application
Description
CVE-2026-21634 is a vulnerability in Ubiquiti Inc's UniFi Protect Application (version 6.1.79 and earlier) where a malicious actor on an adjacent network can cause a buffer overflow in the discovery protocol, leading to application restarts. This denial-of-service condition affects availability but does not impact confidentiality or integrity. The vulnerability has a CVSS score of 6.5 (medium severity). A fix is available by updating to UniFi Protect Application version 6.2.72 or later.
CVSS v3.1
Score 6.5medium
Affected software
Ubiquiti Inc
UniFi Protect Application
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability involves a buffer overflow (CWE-119) in the UniFi Protect Application's discovery protocol that can be triggered by an attacker with access to the adjacent network. Exploitation causes the application to restart, resulting in denial of service. The issue affects versions 6.1.79 and earlier. The vendor has released a patched version 6.2.72 that addresses this flaw.
Potential Impact
The vulnerability allows an unauthenticated attacker on the adjacent network to cause the UniFi Protect Application to restart, disrupting service availability. There is no impact on confidentiality or integrity according to the CVSS vector. No known exploits are reported in the wild.
Mitigation Recommendations
Update the UniFi Protect Application to version 6.2.72 or later to remediate this vulnerability. This official fix resolves the buffer overflow issue in the discovery protocol. No additional mitigations are indicated by the vendor.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- hackerone
- Date Reserved
- 2026-01-01T15:00:02.338Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 695bec94b7d62031395509de
Added to database: 01/05/2026, 16:53:40 UTC
Last enriched: 05/26/2026, 20:26:40 UTC
Last updated: 09/10/2026, 22:30:21 UTC
Views: 1185
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.