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CVE-2026-54401 is a server-side request forgery (SSRF) vulnerability affecting Ubiquiti UniFi OS devices, including the UniFi OS Server and UDM family, and also reported as affecting standard UniFi OS / Server consoles version 5.1.15 and earlier, UNAS 5.1.16 and earlier, and EF-Core 5.1.18 and earlier. The available reporting states that a remote attacker with network access and low privileges can exploit the SSRF condition to cause the vulnerable UniFi OS instance to issue unintended server-side requests, resulting in privilege escalation within the affected device or instance. Specific vulnerable functions or endpoints are not identified in the provided content.
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What an attacker gets, and what they’ve been doing with it.
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No public exploit code observed for this vulnerability.
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Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
5 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A high-severity SSRF vulnerability in Ubiquiti UniFi OS that can allow a remote low-privileged attacker to escalate privileges.
A high-severity SSRF vulnerability in UniFi OS affecting the UDM/UNVR/UNAS family that enables privilege escalation.
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.