Is CVE-2026-34909 in the CISA KEV catalog?

Yes. CVE-2026-34909 is on the CISA Known Exploited Vulnerabilities list, added 2026-06-23.

What is the CVSS severity of CVE-2026-34909?

CVE-2026-34909 has a CVSS v3 base score of 10.0 (CRITICAL).

What is the EPSS score for CVE-2026-34909?

CVE-2026-34909 has an EPSS score of 0.90% (55th percentile), estimating the probability of exploitation in the next 30 days.

CVE & CISA-KEV Catalog

CVE-2026-34909

CRITICALCISA KEV

10.0

CVSS v3

NVD

Description

A malicious actor with access to the network could exploit a Path Traversal vulnerability found in UniFi OS devices to access files on the underlying system that could be manipulated to access an underlying account.

CWE-22Path Traversal

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeChanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Exploit Intelligence

0.90%probability of exploitation in 30 days

55thpercentile

Moderate risk: more likely to be exploited than 55% of all known CVEs.

Known Exploited Vulnerability (CISA KEV)

Remediation due: 2026-06-26

References

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-06-24.