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CVE-2026-34908

A malicious actor with access to the network could exploit an Improper Access Control...

10.0 CriticalIn KEVPublic exploit

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.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
None
User interaction
None

What an attacker can affect

Confidentiality
High
Integrity
High
Availability
High

Exploit likelihood

88.9%Up 88.9 points since May 22, 2026
90%50%10%1%

What each source reports

CVE List Score used 10.0

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.

Record
CVE-2026-34908
CVSS 3.1
10.0 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Weakness
CWE-284
Updated
2026-11-02
EUVDEUVD-2026-31383 10.0

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.

Record
EUVD-2026-31383
CVSS 3.1
10.0 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Updated
2026-11-02
GitHub AdvisoriesGHSA-p8c5-xwrc-584f 10.0

A malicious actor with access to the network could exploit an Improper Access Control...

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.

Record
GHSA-p8c5-xwrc-584f
CVSS 3.1
10.0 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Weakness
CWE-284
Updated
2026-11-02
CISA KEV No score

Ubiquiti UniFi OS Improper Access Control Vulnerability

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.

Record
CVE-2026-34908
Weakness
CWE-284
Updated
2026-11-02
NVD 10.0

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.

Record
CVE-2026-34908
CVSS 3.1
10.0 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Weakness
CWE-284
Updated
2026-11-02

Affected products

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Public exploits

Links only. Every CVE stores no exploit code.

Public exploits
SourceLinkDate
PoC in GitHubBishopFox/CVE-2026-34908-check2026-06-05
NucleiUniFi OS - Authentication Bypass via Path Traversal (..%2f)

History

History
RecordedChangedSources
exploitation, exploits
first indexedCVE List, EUVD, GitHub Advisories, CISA KEV, Nuclei, NVD, PoC in GitHub

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2026-34908 is a critical vulnerability (CVSS 10.0) in Ubiquiti Unifi Os, published May 22, 2026. CISA lists it as known to be exploited, since June 23, 2026. EUVD reports exploitation since June 23, 2026. Public exploit code exists. EPSS puts the chance of exploitation in the next 30 days at 88.9%, the 99th percentile. No source names a fixed version.

References

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