How severe is CVE-2026-34910?

CVE-2026-34910 has a CVSS 3.x base score of 10.0, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-34910 being actively exploited?

Yes. CVE-2026-34910 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2026-06-23, which means active exploitation has been confirmed. It should be prioritised for remediation.

What products are affected by CVE-2026-34910?

CVE-2026-34910 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-2026-34910?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Because this CVE is known to be actively exploited, treat remediation as urgent — CISA KEV typically sets a short remediation deadline.

Does CVE-2026-34910 have an EU (EUVD) identifier?

Yes. CVE-2026-34910 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-31382. It is also flagged as exploited in the EUVD (since 2026-06-23).

When was CVE-2026-34910 published?

CVE-2026-34910 was published on 2026-05-22 and last updated on 2026-06-24.

CVE-2026-34910

CVE-2026-34910 is a critical-severity vulnerability in Ui Unifi Os Server with a CVSS 3.x base score of 10.0. It is listed in CISA's Known Exploited Vulnerabilities (KEV) catalog, confirming it has been exploited in the wild (added 2026-06-23). The underlying weakness is classified as CWE-20.

Key facts

Severity: Critical (CVSS 3.x base score 10.0)
EPSS exploit prediction: 79% (100th percentile)
Actively exploited: Yes — listed in CISA KEV (added 2026-06-23)
EU (EUVD) id: EUVD-2026-31382
EU exploitation: Flagged exploited in the ENISA EU Vulnerability Database (since 2026-06-23)
Weakness: CWE-20
Affected product: Ui Unifi Os Server
Published: 2026-05-22
Last modified: 2026-06-24

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.

Frequently asked questions

What is CVE-2026-34910?: 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.
How severe is CVE-2026-34910?: CVE-2026-34910 has a CVSS 3.x base score of 10.0, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-34910 being actively exploited?: Yes. CVE-2026-34910 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2026-06-23, which means active exploitation has been confirmed. It should be prioritised for remediation.
What products are affected by CVE-2026-34910?: CVE-2026-34910 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-2026-34910?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Because this CVE is known to be actively exploited, treat remediation as urgent — CISA KEV typically sets a short remediation deadline.
Does CVE-2026-34910 have an EU (EUVD) identifier?: Yes. CVE-2026-34910 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-31382. It is also flagged as exploited in the EUVD (since 2026-06-23).
When was CVE-2026-34910 published?: CVE-2026-34910 was published on 2026-05-22 and last updated on 2026-06-24.

References

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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