CVE-2026-34910
Summary
| CVE | CVE-2026-34910 |
|---|---|
| State | PUBLISHED |
| Assigner | hackerone |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-05-22 02:16:34 UTC |
| Updated | 2026-06-24 05:17:27 UTC |
| Description | 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. |
Risk And Classification
Primary CVSS: v3.1 10 CRITICAL from [email protected]
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
EPSS: 0.336150000 probability, percentile 0.981630000 (date 2026-06-23)
CISA KEV: Listed on 2026-06-23; due 2026-06-26; ransomware use Unknown
Problem Types: CWE-20 | CWE-20 CWE-20 Improper Input Validation
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 3.1 | [email protected] | Secondary | 10 | CRITICAL | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H |
| 3.1 | CNA | DECLARED | 10 | CRITICAL | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H |
CVSS v3.1 Breakdown
Attack Vector
NetworkAttack Complexity
LowPrivileges Required
NoneUser Interaction
NoneScope
ChangedConfidentiality
HighIntegrity
HighAvailability
HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
CISA Known Exploited Vulnerability
| Vendor | Ubiquiti |
|---|---|
| Product | UniFi OS |
| Name | Ubiquiti UniFi OS Improper Input Validation Vulnerability |
| 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. |
| Notes | 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 |
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Ubiquiti Inc | UniFi OS Server | affected 5.0.8 semver | Not specified |
| CNA | Ubiquiti Inc | UDM | affected 5.1.12 semver | Not specified |
| CNA | Ubiquiti Inc | UDM-Pro | affected 5.1.12 semver | Not specified |
| CNA | Ubiquiti Inc | UDM-SE | affected 5.1.12 semver | Not specified |
| CNA | Ubiquiti Inc | UDM-Pro-Max | affected 5.1.12 semver | Not specified |
| CNA | Ubiquiti Inc | UDM-Beast | affected 5.1.11 semver | Not specified |
| CNA | Ubiquiti Inc | EFG | affected 5.1.12 semver | Not specified |
| CNA | Ubiquiti Inc | UDW | affected 5.1.12 semver | Not specified |
| CNA | Ubiquiti Inc | UDR | affected 5.1.12 semver | Not specified |
| CNA | Ubiquiti Inc | UDR7 | affected 5.1.12 semver | Not specified |
| CNA | Ubiquiti Inc | UDR-5G | affected 5.1.12 semver | Not specified |
| CNA | Ubiquiti Inc | Express 7 | affected 5.1.12 semver | Not specified |
| CNA | Ubiquiti Inc | UNVR | affected 5.1.12 semver | Not specified |
| CNA | Ubiquiti Inc | UNVR-Pro | affected 5.1.12 semver | Not specified |
| CNA | Ubiquiti Inc | UNVR-Instant | affected 5.1.12 semver | Not specified |
| CNA | Ubiquiti Inc | UNVR-G2 | affected 5.1.12 semver | Not specified |
| CNA | Ubiquiti Inc | UNVR-G2-Pro | affected 5.1.12 semver | Not specified |
| CNA | Ubiquiti Inc | ENVR | affected 5.1.12 semver | Not specified |
| CNA | Ubiquiti Inc | ENVR-Core | affected 5.1.12 semver | Not specified |
| CNA | Ubiquiti Inc | UNAS-2 | affected 5.1.10 semver | Not specified |
| CNA | Ubiquiti Inc | UNAS-4 | affected 5.1.10 semver | Not specified |
| CNA | Ubiquiti Inc | UNAS-Pro | affected 5.1.10 semver | Not specified |
| CNA | Ubiquiti Inc | UNAS-Pro-4 | affected 5.1.10 semver | Not specified |
| CNA | Ubiquiti Inc | UNAS-Pro-8 | affected 5.1.10 semver | Not specified |
| CNA | Ubiquiti Inc | UCKP | affected 5.1.12 semver | Not specified |
| CNA | Ubiquiti Inc | UCK | affected 5.1.12 semver | Not specified |
| CNA | Ubiquiti Inc | UCK-Enterprise | affected 5.1.12 semver | Not specified |
| CNA | Ubiquiti Inc | UCG-Ultra | affected 5.1.12 semver | Not specified |
| CNA | Ubiquiti Inc | UCG-Max | affected 5.1.12 semver | Not specified |
| CNA | Ubiquiti Inc | UCG-Fiber | affected 5.1.12 semver | Not specified |
| CNA | Ubiquiti Inc | UCG-Industrial | affected 5.1.12 semver | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| www.cisa.gov/known-exploited-vulnerabilities-catalog | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | www.cisa.gov | |
| community.ui.com/releases/Security-Advisory-Bulletin-064-064/84811c09-4cf4-42a... | [email protected] | community.ui.com | |
| www.pwndefend.com/2026/06/09/cve-2026-34910-exploitation-itw-building-a-botnet-... | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | www.pwndefend.com | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
| CISA Known Exploited Vulnerabilities catalog | CISA | www.cisa.gov | kev |
No vendor comments have been submitted for this CVE.
Additional Advisory Data
| Source | Time | Event |
|---|---|---|
| ADP | 2026-06-23T00:00:00.000Z | CVE-2026-34910 added to CISA KEV |
There are currently no legacy QID mappings associated with this CVE.