CVE-2026-34908
Ubiquiti UniFi OS Improper Access Control Vulnerability - [Actively Exploited]
Description
A malicious actor with access to the network could exploit an Improper Access Control vulnerability found in UniFi OS devices to make unauthorized changes to the system.
INFO
Published Date :
May 22, 2026, 2:16 a.m.
Last Modified :
June 24, 2026, 2:50 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CISA KEV (Known Exploited Vulnerabilities)
For the benefit of the cybersecurity community and network defenders—and to help every organization better manage vulnerabilities and keep pace with threat activity—CISA maintains the authoritative source of vulnerabilities that have been exploited in the wild.
Ubiquiti UniFi OS contains an improper access control vulnerability which could allow a malicious actor with access to the network to make unauthorized changes to the system.
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.
Unknown
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-2026-34908
Affected Products
The following products are affected by CVE-2026-34908
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 3.1 | CRITICAL | [email protected] |
Solution
- Implement least privilege access controls.
- Review and restrict user permissions.
- Apply security updates for UniFi OS.
- Monitor device access logs.
Public PoC/Exploit Available at Github
CVE-2026-34908 has a 6 public
PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-34908.
| URL | Resource |
|---|---|
| https://community.ui.com/releases/Security-Advisory-Bulletin-064-064/84811c09-4cf4-42ab-bd61-cc994445963b | Patch Vendor Advisory |
| https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-34908 | US Government Resource |
| https://www.pwndefend.com/2026/06/09/cve-2026-34910-exploitation-itw-building-a-botnet-mirai/ | Exploit Third Party Advisory |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-34908 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-34908
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
A lightweight bash-based monitor that periodically checks whether your UniFi management interface is exposed to the internet.
Shell
A lightweight bash-based monitor that periodically checks whether your UniFi management interface is exposed to the internet.
Shell
unifi os 5.0.6 pass traversal to admin & code exec scripts
Python
Safely detect whether a UniFi OS Server is vulnerable to CVE-2026-34908
Python
A list of all of my starred repos, automated using Github Actions 🌟
github-actions stars
📡 PoC auto collect from GitHub. ⚠️ Be careful Malware.
security cve exploit poc vulnerability
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-34908 vulnerability anywhere in the article.
-
TheCyberThrone
CISA’s KEV Wave: Ubiquiti, Lantronix, and Cisco Unified CM Join the List
CISA’s Known Exploited Vulnerabilities catalog has had a busy several days. On June 23, 2026, three perfect-10 Ubiquiti UniFi OS flaws and a 9.8 root-access Lantronix bug landed in KEV together, with ... Read more
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The Hacker News
CISA Warns Critical Lantronix EDS5000 Flaw Is Being Actively Exploited
The U.S. Cybersecurity and Infrastructure Security Agency (CISA) on Tuesday warned of active exploitation of a critical security flaw impacting Lantronix EDS5000 Series devices, urging Federal Civilia ... Read more
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security.nl
VS meldt voor het eerst misbruik van kritieke Ubiquiti UniFi OS-lekken
Aanvallers maken actief misbruik van drie kritieke kwetsbaarheden in Ubiquiti UniFi OS waardoor aanvallers toegang tot apparaten kunnen krijgen, zo meldt het Amerikaanse cyberagentschap CISA. Het is v ... Read more
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CybersecurityNews
Ubiquiti Patches Critical UniFi OS Vulnerabilities Allowing Remote Privilege Escalation
Ubiquiti Networks has released urgent security updates to address a series of highly critical vulnerabilities affecting its UniFi OS platform. These severe flaws could allow unauthenticated, remote at ... Read more
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security.nl
Kritieke Ubiquiti-lekken geven aanvaller toegang tot UniFi OS-apparaten
Netwerkfabrikant Ubiquiti heeft updates uitgerold voor vijf kwetsbaarheden waardoor aanvallers toegang tot UniFi OS-apparaten kunnen krijgen. De impact van drie beveiligingslekken is beoordeeld met ee ... Read more
The following table lists the changes that have been made to the
CVE-2026-34908 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
New CVE Received by [email protected]
May. 22, 2026
Action Type Old Value New Value Added Description A malicious actor with access to the network could exploit an Improper Access Control vulnerability found in UniFi OS devices to make unauthorized changes to the system. Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H Added CWE CWE-284 Added Reference https://community.ui.com/releases/Security-Advisory-Bulletin-064-064/84811c09-4cf4-42ab-bd61-cc994445963b