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Vulnerabilities / CVE-2026-34910

CVE-2026-34910

Published 2026-05-22 · published (not yet in NVD)

CVE-2026-34910

Exploited in the wild: CISA added it to the Known Exploited Vulnerabilities catalog on 2026-06-23, with a fix-by date of 2026-06-26. Patch it first.

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.

10.0 CRITICAL
CVSS 3.1 · CNA
90%
chance of exploitation in the next 30 days (EPSS; in the top 1% of all CVEs)

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.

Scores

10.0CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:HCNA

Affected products

  • Ubiquiti Inc UniFi OS Server: < 5.0.8
  • Ubiquiti Inc UDM: < 5.1.12
  • Ubiquiti Inc UDM-Pro: < 5.1.12
  • Ubiquiti Inc UDM-SE: < 5.1.12
  • Ubiquiti Inc UDM-Pro-Max: < 5.1.12
  • Ubiquiti Inc UDM-Beast: < 5.1.11
  • Ubiquiti Inc EFG: < 5.1.12
  • Ubiquiti Inc UDW: < 5.1.12
  • Ubiquiti Inc UDR: < 5.1.12
  • Ubiquiti Inc UDR7: < 5.1.12
  • Ubiquiti Inc UDR-5G: < 5.1.12
  • Ubiquiti Inc Express 7: < 5.1.12
  • Ubiquiti Inc UNVR: < 5.1.12
  • Ubiquiti Inc UNVR-Pro: < 5.1.12
  • Ubiquiti Inc UNVR-Instant: < 5.1.12
  • Ubiquiti Inc UNVR-G2: < 5.1.12
  • Ubiquiti Inc UNVR-G2-Pro: < 5.1.12
  • Ubiquiti Inc ENVR: < 5.1.12
  • Ubiquiti Inc ENVR-Core: < 5.1.12
  • Ubiquiti Inc UNAS-2: < 5.1.10
  • Ubiquiti Inc UNAS-4: < 5.1.10
  • Ubiquiti Inc UNAS-Pro: < 5.1.10
  • Ubiquiti Inc UNAS-Pro-4: < 5.1.10
  • Ubiquiti Inc UNAS-Pro-8: < 5.1.10
  • Ubiquiti Inc UCKP: < 5.1.12

Weakness: CWE-20

1 references (advisories, patches, write-ups)

Sources: CVE.org, FIRST EPSS. Missing ones did not answer or have no record yet.

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