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CVE-2026-34908

CRITICALCVSS 10/10Actively ExploitedEPSS 2.45%

Last modified

CVE-2026-34908 is a critical-severity vulnerability rated 10/10 on the CVSS scale. 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.. CISA has confirmed active exploitation in the wild. EPSS estimates a 2.45% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1
10/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

EPSS Probability
2.45%

82.3th percentile

Probability of exploitation in the next 30 days. Learn more

Exploitation Status

This vulnerability is listed in CISA’s Known Exploited Vulnerabilities catalog, confirming active exploitation in the wild. Federal agencies must remediate by .

Weakness Enumeration

Affected Software

VendorProductVersions
UiUnifi Os Server< 5.0.8
UiUnifi Cloud Gateway Industrial Firmware< 5.1.12
UiUnifi Dream Machine Firmware< 5.1.12
UiUnifi Dream Machine Pro Firmware< 5.1.12
UiUnifi Dream Machine Special Edition Firmware< 5.1.12
UiUnifi Dream Machine Pro Max Firmware< 5.1.12
UiEnterprise Fortress Gateway Firmware< 5.1.12
UiUnifi Dream Wall Firmware< 5.1.12
UiUnifi Dream Router Firmware< 5.1.12
UiUnifi Dream Router 7 Firmware< 5.1.12
UiUnifi Express 7 Firmware< 5.1.12
UiUnifi Network Video Recorder Firmware< 5.1.12
UiUnifi Network Video Recorder Pro Firmware< 5.1.12
UiUnifi Network Video Recorder Instant Firmware< 5.1.12
UiEnterprise Network Video Recorder Firmware< 5.1.12
UiUnifi Cloud Gateway Ultra Firmware< 5.1.12
UiUnifi Cloud Gateway Max Firmware< 5.1.12
UiUnifi Cloud Gateway Fiber Firmware< 5.1.12
UiUnifi Dream Router 5g Max Firmware< 5.1.12
UiEnterprise Network Video Recorder Core Firmware< 5.1.12
UiUnifi Cloud Key Plus Firmware< 5.1.12
UiUnifi Cloudkey Firmware< 5.1.12
UiUnifi Cloudkey Enterprise Firmware< 5.1.12
UiUnifi Network Video Recorder G2 Firmware< 5.1.12
UiUnifi Network Video Recorder G2 Pro Firmware< 5.1.12
UiUnifi Dream Machine Beast Firmware< 5.1.11
UiUnas 2 Firmware< 5.1.10
UiUnas 4 Firmware< 5.1.10
UiUnas Pro Firmware< 5.1.10
UiUnas Pro 4 Firmware< 5.1.10
UiUnas Pro 8 Firmware< 5.1.10

References

Timeline

Published
Last Modified
Status
Analyzed

Frequently Asked Questions

What is CVE-2026-34908?
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.
How severe is CVE-2026-34908?
CVE-2026-34908 has a CVSS score of 10/10 (CRITICAL severity). The EPSS model estimates a 2.45% probability of exploitation in the next 30 days. This vulnerability is listed in CISA's Known Exploited Vulnerabilities catalog.
How do I fix CVE-2026-34908?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-34908?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST