CVE-2026-34910

Ubiquiti UniFi OS contains an improper input validation vulnerability which could allow a malicious actor with access to the network to conduct…

Browse: All 2026 CVEs · All vendors

CVSS score: 10.0 Critical
CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
CISA KEV: Yes — actively exploited (added 2026-06-23, remediation due 2026-06-26)
Weakness (CWE): CWE-20
Published: 2026-05-22
Last modified: 2026-07-23
NVD status: Analyzed

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.

Affected products

ui unifi os server
ui unifi cloud gateway industrial firmware
ui unifi dream machine firmware
ui unifi dream machine pro firmware
ui unifi dream machine special edition firmware
ui unifi dream machine pro max firmware
ui enterprise fortress gateway firmware
ui unifi dream wall firmware
ui unifi dream router firmware
ui unifi dream router 7 firmware
ui unifi express 7 firmware
ui unifi network video recorder firmware

Affected ranges per NVD CPE data; confirm exact versions in the vendor advisory.

Required action (CISA)

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. Federal remediation deadline: 2026-06-26.

How to prioritize this

This vulnerability is on the CISA KEV list, meaning it is being actively exploited — treat it as urgent regardless of the raw CVSS number. Use the live CVE lookup for the latest NVD data, and the CVSS 3.1 calculator to model your own environmental score.

References

FAQ

Is CVE-2026-34910 actively exploited?

Yes. CISA added CVE-2026-34910 to its Known Exploited Vulnerabilities (KEV) catalog on 2026-06-23, with a federal remediation deadline of 2026-06-26. A KEV listing means real-world exploitation is confirmed, so patching this should be prioritized above many higher-CVSS bugs that aren't being exploited.

What is the CVSS score of CVE-2026-34910?

CVE-2026-34910 has a CVSS base score of 10.0 (Critical). Its vector string is CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H.

Related vulnerabilities

Data source: NVD & CISA KEV. Shown as-is; nothing added. Last generated from NVD data — re-check the live tool for updates.