KEV / Record
CVE-2026-34910: Ubiquiti UniFi OS Improper Input Validation Vulnerability
Answer CVE-2026-34910 is in CISA's Known Exploited Vulnerabilities catalog. It was added on 2026-06-23, and US federal civilian agencies must act on it by 2026-06-26.
DCISA description
Ubiquiti UniFi OS contains an improper input validation vulnerability which could allow a malicious actor with access to the network to conduct command injection.
ARequired action
Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.
RNotes and references
https://community.ui.com/releases/Security-Advisory-Bulletin-064-064/84811c09-4cf4-42ab-bd61-cc994445963b ; BOD 26-04: https://www.cisa.gov/news-events/directives/bod-26-04-prioritizing-security-updates-based-risk ; Forensics Triage Requirements: https://www.cisa.gov/news-events/directives/bod-26-04-implementation-guidance-prioritizing-security-updates-based-risk ; https://nvd.nist.gov/vuln/detail/CVE-2026-34910
FRecord
- CVE
- CVE-2026-34910
- Vendor
- Ubiquiti (4 entries in KEV)
- Product
- UniFi OS (3 entries)
- Added to KEV
- Federal due date
- Past due date (2026-06-26)
- Remediation window
- 3 days
- Known ransomware use
- Unknown (not confirmed by CISA)
VOther Ubiquiti entries in KEV
| CVE | Product | Added | Ransomware |
|---|---|---|---|
| CVE-2026-34909 | UniFi OS | Unknown | |
| CVE-2026-34908 | UniFi OS | Unknown | |
| CVE-2010-5330 | AirOS | Unknown |
This record repeats CISA's entry and is excluded from search indexes until an analyst note is added.
Source: CISA KEV catalog v2026.09.23, released 2026-09-23. Windows end 2026-09-23.