CSIRTS // UNIFIED SECURITY ADVISORY FEEDSYS ● ONLINE · POWERED BY INTELFUSIONS.COM

← Back to feed

CVE-2026-34910: Ubiquiti UniFi OS Improper Input Validation Vulnerability

criticalknown exploitedpublic exploitCVE-2026-34910
Actively exploited. At least one CVE in this advisory is listed in the CISA Known Exploited Vulnerabilities catalog — exploitation has been observed in the wild. Treat remediation as urgent.
Ubiquiti UniFi OS contains an improper input validation vulnerability which could allow a malicious actor with access to the network to conduct command injection.

CSIRTS triage

vendor: Ubiquitiproduct: UniFi OSCode injection
What
An improper input validation vulnerability could allow command injection.
Who is affected
Malicious actors with access to the network using Ubiquiti UniFi OS.
Urgency
Remediation is critical due to the potential for exploitation and the severity of the vulnerability.
Action
Update to the latest version of Ubiquiti UniFi OS.

AI-assisted analysis generated from the source advisory — verify against the original.

⚡ Watch UniFi OS

Get an email when a new UniFi OS advisory drops — max one per day, one-click unsubscribe.

Details

Source
CISA Known Exploited Vulnerabilities (US · database · site)
Severity
critical
Published
2026-06-23
Exploitation
Observed in the wild (CISA KEV)

Original advisory: https://nvd.nist.gov/vuln/detail/CVE-2026-34910

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Referenced CVEs

CVECSIRTS overviewExternal
CVE-2026-34910coverage & exploitation statusNVD · CVE.org

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

Recent advisories for Ubiquiti UniFi OS

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

More from CISA Known Exploited Vulnerabilities