How severe is CVE-2026-34911?

CVE-2026-34911 has a CVSS 3.x base score of 7.7, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2026-34911 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (50th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-34911?

CVE-2026-34911 primarily affects Ui Unifi Os Server. In total, 31 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2026-34911?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2026-34911 have an EU (EUVD) identifier?

Yes. CVE-2026-34911 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-31387.

When was CVE-2026-34911 published?

CVE-2026-34911 was published on 2026-05-22 and last updated on 2026-07-23.

CVE-2026-34911

CVE-2026-34911 is a high-severity vulnerability in Ui Unifi Os Server with a CVSS 3.x base score of 7.7. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-22.

Key facts

Severity: High (CVSS 3.x base score 7.7)
EPSS exploit prediction: 1% (50th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-31387
Weakness: CWE-22
Affected product: Ui Unifi Os Server
Published: 2026-05-22
Last modified: 2026-07-23

Description

A malicious actor with access to the network and low privileges could exploit a Path Traversal vulnerability found in UniFi OS devices to access files on the underlying system that could be manipulated to obtain sensitive information.

Frequently asked questions

What is CVE-2026-34911?: A malicious actor with access to the network and low privileges could exploit a Path Traversal vulnerability found in UniFi OS devices to access files on the underlying system that could be manipulated to obtain sensitive information.
How severe is CVE-2026-34911?: CVE-2026-34911 has a CVSS 3.x base score of 7.7, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2026-34911 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (50th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-34911?: CVE-2026-34911 primarily affects Ui Unifi Os Server. In total, 31 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2026-34911?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-34911 have an EU (EUVD) identifier?: Yes. CVE-2026-34911 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-31387.
When was CVE-2026-34911 published?: CVE-2026-34911 was published on 2026-05-22 and last updated on 2026-07-23.

References

https://community.ui.com/releases/Security-Advisory-Bulletin-064-064/84811c09-4cf4-42ab-bd61-cc994445963b

Affected products (31)

cpe:2.3:a:ui:unifi_os_server:*:*:*:*:*:*:*:*
cpe:2.3:o:ui:unifi_cloud_gateway_industrial_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:ui:unifi_dream_machine_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:ui:unifi_dream_machine_pro_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:ui:unifi_dream_machine_special_edition_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:ui:unifi_dream_machine_pro_max_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:ui:enterprise_fortress_gateway_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:ui:unifi_dream_wall_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:ui:unifi_dream_router_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:ui:unifi_dream_router_7_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:ui:unifi_express_7_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:ui:unifi_network_video_recorder_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:ui:unifi_network_video_recorder_pro_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:ui:unifi_network_video_recorder_instant_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:ui:enterprise_network_video_recorder_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:ui:unifi_cloud_gateway_ultra_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:ui:unifi_cloud_gateway_max_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:ui:unifi_cloud_gateway_fiber_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:ui:unifi_dream_router_5g_max_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:ui:enterprise_network_video_recorder_core_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:ui:unifi_cloud_key_plus_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:ui:unifi_cloudkey_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:ui:unifi_cloudkey_enterprise_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:ui:unifi_network_video_recorder_g2_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:ui:unifi_network_video_recorder_g2_pro_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:ui:unifi_dream_machine_beast_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:ui:unas_2_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:ui:unas_4_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:ui:unas_pro_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:ui:unas_pro_4_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:ui:unas_pro_8_firmware:*:*:*:*:*:*:*:*

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