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CVE-2026-50748 is a critical improper input validation vulnerability in the Ubiquiti UniFi Access Application. According to the provided content, a malicious actor with network access and low privileges can exploit the flaw to achieve command injection on the host device. The issue affects UniFi Access Application version 4.2.28 and earlier and was fixed in version 4.2.29. The available reporting attributes the root cause to improper input validation, but does not identify the specific vulnerable function, endpoint, or parameter.
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No public exploit code observed for this vulnerability.
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8 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A critical command execution vulnerability in Ubiquiti UniFi Access Application caused by improper input validation, allowing a low-privileged network attacker to execute commands on the host device.
A critical improper input validation vulnerability in UniFi Access Application that can lead to command injection on the host device.
One of six additional critical-severity vulnerabilities patched by Ubiquiti affecting UniFi Talk, UniFi Access, UniFi Protect, UniFi OS Server, and various Ubiquiti devices.
A critical command injection vulnerability in UniFi Access, described in the table as improper input validation, that can be exploited by low-privileged network users to escalate to full control.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.