CVE-2026-34910

Exp

A malicious actor with access to the network could exploit an Improper Input Validation vulnerability found in UniFi OS devices to execute a Command Injection.

Published: 2026-05-21 Last update: 2026-06-24 Assigner: [email protected] Source: [email protected]
NVD Status：Analyzed，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2026-34910 is rated Critical Active Threat (96.6/100): CVSS Critical severity, with high exploitation likelihood (EPSS 78.55%, 100th percentile). CISA KEV confirms active exploitation (added 2026-06-23) affecting Ubiquiti / UniFi OS. a weakness (CWE-20) Unauthenticated remote administrative access may be possible. The CISA remediation deadline has passed—treat as an emergency patch priority.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

CISA KEV Record for CVE-2026-34910

Name: Ubiquiti UniFi OS Improper Input Validation Vulnerability · CISA KEV detail

Exploit added: 2026-06-23

Action due: 2026-06-26

Required 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.

Public exploit references (Exploit-DB) for CVE-2026-34910

EDB-ID Source Kind Published Link
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2026-34910

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-25 81.84% 78.55% -3.28%
2 2026-06-24 33.62% 81.84% +48.22%
3 2026-06-23 — 33.62% —

Full EPSS history (9 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2026-34910

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
10.0 3.1 CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:C)
Breaking this can reach past the original component and bite other resources—bigger blast radius.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.9 6.0 [email protected]

Weakness enumeration for CVE-2026-34910

GitHub Security Advisory for CVE-2026-34910

GHSA-fvgm-jgwh-qwx7 · Severity: critical — A malicious actor with access to the network could exploit an Improper Input Validation...

Affected software / configurations for CVE-2026-34910

Vendor Product Version Raw CPE
ui unifi_os_server < 5.0.8 cpe:2.3:a:ui:unifi_os_server:*:*:*:*:*:*:*:*
ui unifi_cloud_gateway_industrial_firmware < 5.1.12 cpe:2.3:o:ui:unifi_cloud_gateway_industrial_firmware:*:*:*:*:*:*:*:*
ui unifi_dream_machine_firmware < 5.1.12 cpe:2.3:o:ui:unifi_dream_machine_firmware:*:*:*:*:*:*:*:*
ui unifi_dream_machine_pro_firmware < 5.1.12 cpe:2.3:o:ui:unifi_dream_machine_pro_firmware:*:*:*:*:*:*:*:*
ui unifi_dream_machine_special_edition_firmware < 5.1.12 cpe:2.3:o:ui:unifi_dream_machine_special_edition_firmware:*:*:*:*:*:*:*:*
ui unifi_dream_machine_pro_max_firmware < 5.1.12 cpe:2.3:o:ui:unifi_dream_machine_pro_max_firmware:*:*:*:*:*:*:*:*
ui enterprise_fortress_gateway_firmware < 5.1.12 cpe:2.3:o:ui:enterprise_fortress_gateway_firmware:*:*:*:*:*:*:*:*
ui unifi_dream_wall_firmware < 5.1.12 cpe:2.3:o:ui:unifi_dream_wall_firmware:*:*:*:*:*:*:*:*
ui unifi_dream_router_firmware < 5.1.12 cpe:2.3:o:ui:unifi_dream_router_firmware:*:*:*:*:*:*:*:*
ui unifi_dream_router_7_firmware < 5.1.12 cpe:2.3:o:ui:unifi_dream_router_7_firmware:*:*:*:*:*:*:*:*
ui unifi_express_7_firmware < 5.1.12 cpe:2.3:o:ui:unifi_express_7_firmware:*:*:*:*:*:*:*:*
ui unifi_network_video_recorder_firmware < 5.1.12 cpe:2.3:o:ui:unifi_network_video_recorder_firmware:*:*:*:*:*:*:*:*
ui unifi_network_video_recorder_pro_firmware < 5.1.12 cpe:2.3:o:ui:unifi_network_video_recorder_pro_firmware:*:*:*:*:*:*:*:*
ui unifi_network_video_recorder_instant_firmware < 5.1.12 cpe:2.3:o:ui:unifi_network_video_recorder_instant_firmware:*:*:*:*:*:*:*:*
ui enterprise_network_video_recorder_firmware < 5.1.12 cpe:2.3:o:ui:enterprise_network_video_recorder_firmware:*:*:*:*:*:*:*:*
ui unifi_cloud_gateway_ultra_firmware < 5.1.12 cpe:2.3:o:ui:unifi_cloud_gateway_ultra_firmware:*:*:*:*:*:*:*:*
ui unifi_cloud_gateway_max_firmware < 5.1.12 cpe:2.3:o:ui:unifi_cloud_gateway_max_firmware:*:*:*:*:*:*:*:*
ui unifi_cloud_gateway_fiber_firmware < 5.1.12 cpe:2.3:o:ui:unifi_cloud_gateway_fiber_firmware:*:*:*:*:*:*:*:*
ui unifi_dream_router_5g_max_firmware < 5.1.12 cpe:2.3:o:ui:unifi_dream_router_5g_max_firmware:*:*:*:*:*:*:*:*
ui enterprise_network_video_recorder_core_firmware < 5.1.12 cpe:2.3:o:ui:enterprise_network_video_recorder_core_firmware:*:*:*:*:*:*:*:*
ui unifi_cloud_key_plus_firmware < 5.1.12 cpe:2.3:o:ui:unifi_cloud_key_plus_firmware:*:*:*:*:*:*:*:*
ui unifi_cloudkey_firmware < 5.1.12 cpe:2.3:o:ui:unifi_cloudkey_firmware:*:*:*:*:*:*:*:*
ui unifi_cloudkey_enterprise_firmware < 5.1.12 cpe:2.3:o:ui:unifi_cloudkey_enterprise_firmware:*:*:*:*:*:*:*:*
ui unifi_network_video_recorder_g2_firmware < 5.1.12 cpe:2.3:o:ui:unifi_network_video_recorder_g2_firmware:*:*:*:*:*:*:*:*
ui unifi_network_video_recorder_g2_pro_firmware < 5.1.12 cpe:2.3:o:ui:unifi_network_video_recorder_g2_pro_firmware:*:*:*:*:*:*:*:*
ui unifi_dream_machine_beast_firmware < 5.1.11 cpe:2.3:o:ui:unifi_dream_machine_beast_firmware:*:*:*:*:*:*:*:*
ui unas_2_firmware < 5.1.10 cpe:2.3:o:ui:unas_2_firmware:*:*:*:*:*:*:*:*
ui unas_4_firmware < 5.1.10 cpe:2.3:o:ui:unas_4_firmware:*:*:*:*:*:*:*:*
ui unas_pro_firmware < 5.1.10 cpe:2.3:o:ui:unas_pro_firmware:*:*:*:*:*:*:*:*
ui unas_pro_4_firmware < 5.1.10 cpe:2.3:o:ui:unas_pro_4_firmware:*:*:*:*:*:*:*:*
ui unas_pro_8_firmware < 5.1.10 cpe:2.3:o:ui:unas_pro_8_firmware:*:*:*:*:*:*:*:*

References for CVE-2026-34910

cvelogic Threat Intelligence