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Ubiquiti released Security Advisory Bulletin 064 to fix five vulnerabilities in UniFi OS, including three unauthenticated remote code execution flaws tracked as CVE-2026-34908, CVE-2026-34909, and CVE-2026-34910, each described by community reporting as CVSS 10.0 issues affecting a broad range of UDM, UCG, and UNVR devices. The advisory also addressed CVE-2026-33000, a CVSS 9.1 command injection vulnerability in UniFi OS Server that can let an attacker with administrative privileges and network access execute arbitrary operating system commands and potentially gain root-level control over managed infrastructure.
The command injection bug was reported through HackerOne by researcher V3rlust, and Ubiquiti said UniFi OS Server 5.0.8 and later contain the fix, while 5.0.6 and earlier are confirmed vulnerable. Public reporting noted that roughly 87,196 exposed UniFi Network Application hosts were visible from the internet, raising concern that the unauthenticated RCE flaws could be chained with the command injection issue to compromise internet-facing deployments; administrators were urged to update firmware immediately, restrict management-plane exposure, and verify patch status across deployed systems.
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3 events from the most recent confirmed update back to the earliest known activity.
At the time of the disclosure analysis, Censys observed 87,196 exposed UniFi Network Application hosts, indicating substantial potential exposure. The source does not explicitly anchor this observation to a specific event date.
On 2026-05-21, Ubiquiti disclosed Security Advisory Bulletin 064 covering five vulnerabilities, including CVE-2026-33000 and three unauthenticated RCE flaws tracked as CVE-2026-34908, CVE-2026-34909, and CVE-2026-34910. The advisory states CVE-2026-33000 was patched in UniFi OS Server version 5.0.8 and later, while version 5.0.6 and earlier were confirmed vulnerable.
The command injection vulnerability CVE-2026-33000 in UniFi OS Server was reported to Ubiquiti by researcher V3rlust through HackerOne. The source does not provide a specific date for the report.
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Ubiquiti released Security Advisory Bulletin 065 to address five vulnerabilities in **UniFi OS**, including critical path traversal (`CVE-2026-47368`), privilege escalation (`CVE-2026-47369`), and command injection (`CVE-2026-47370`) flaws that affect a wide range of consoles, gateways, servers, NVRs, NAS devices, Dream Machines, Cloud Keys, and Express products. The advisory says a network-adjacent attacker could abuse the bugs to read arbitrary files, escalate privileges, execute commands, and in some cases make unauthorized configuration changes through `CVE-2026-48610`, with several issues rated as high as **CVSS 9.9**. Ubiquiti warned that the vulnerabilities can be chained, allowing attackers to remove privilege requirements and potentially reach full device compromise, echoing broader concern over repeated severe UniFi OS weaknesses. Firmware updates were issued with fixes in **UniFi OS 5.1.15** for most affected families, **5.1.16** for **UNAS** devices, and **4.0.15** for **Express** appliances; security reporting around the bulletin also urged organizations to patch all listed CVEs together and treat previously exposed, unpatched management interfaces as potentially compromised.
Jul 12, 2026
Ubiquiti released security updates for **UniFi OS** to fix five vulnerabilities affecting widely deployed products including **UniFi Cloud Gateway, UniFi Dream Machine, UNVR, NAS devices, consoles, and UniFi OS Server**. Three flaws—`CVE-2026-34908`, `CVE-2026-34909`, and `CVE-2026-34910`—were rated **CVSS 10.0** and could be exploited by remote, unauthenticated attackers to change system settings, read sensitive files through path traversal, or trigger command injection that could lead to remote code execution. Two additional issues, `CVE-2026-33000` and `CVE-2026-34911`, could also enable command injection, path traversal, privilege escalation, persistence, and data theft under certain conditions. The vulnerabilities were reported through **HackerOne**, and Ubiquiti said they can be exploited with low complexity, although it did not say whether they had been abused before patches were issued. Government and national CERT advisories, including Canada’s Cyber Centre and Germany’s dCERT, directed administrators to review Ubiquiti bulletin 064 and apply updated firmware and software versions immediately. The risk is amplified by the large number of Internet-exposed UniFi OS systems—reportedly close to **100,000**—because these appliances often sit at the network edge and can provide attackers with a path into internal environments if management interfaces are publicly reachable.
Jun 29, 2026
Multiple critical vulnerabilities in **Ubiquiti UniFi OS** can be chained to give an unauthenticated attacker **remote code execution as root** on exposed devices. Fortinet reported active in-the-wild exploitation of an exploit chain involving `CVE-2026-34908`, `CVE-2026-34909`, and `CVE-2026-34910`, combining authentication bypass, path traversal, access to protected resources, and arbitrary command execution. Researchers have publicly demonstrated the chain, raising the risk for organizations that use UniFi OS to manage gateways, network controllers, video surveillance, and access control systems. `CVE-2026-34909` is described as a **CVSS 10.0** path traversal flaw that can expose sensitive files and enable account compromise, while `CVE-2026-34910` is a **CVSS 10.0** command injection bug affecting a wide range of UniFi hardware and the software-only **UniFi OS Server**. Ubiquiti addressed the issues in **Security Advisory Bulletin 064** with firmware updates across product families, including **UniFi OS 5.1.12** for many devices and other fixed releases for NAS, UDM Beast, and UniFi OS Server platforms. Defenders are being urged to patch immediately, limit management interfaces to trusted networks, review internet-exposed systems for compromise, and perform integrity checks because persistence may remain after remediation.
Jul 12, 2026