Ubiquiti UniFi Cloud Gateway Ultra (UCG-Ultra)
Security Evaluation
1. Device Security
2. System Security
3. User Authentication
Technical Specifications
PROVISIONAL CONSERVATIVE SCENARIO — NOT CONFIRMED DEVICE DEFECTS. Unknown items use the upper-bound score by submitter request. The letter grade below is temporary, subject to further evidence and administrator review.
Provisional assessment — not administrator approved
Conservative provisional rating: F; GRAS 9/9.
This is an explicitly assumed upper-bound document-review scenario, not a confirmed dangerousness finding or an administrator-approved classification. On 25 October 2026 the submitter authorized selecting the highest evidence-consistent candidate score for each criterion. A completely unknown item is temporarily scored 3. The selected labels such as Very common, No encryption, No authentication or Absent do NOT establish that those conditions were observed. Unknown is not evidence of absence.
No physical device, installed firmware or actual configuration was inspected. Missing optional hardware parameters remain blank. Administrator-only classification date and calculator-version fields have not been set. The official classification may remain blank until administrator approval.
Scope
UCG-Ultra；区分Cloud Gateway Max、UniFi Express及Dream Machine；平台文档需与安装版本对应。
Calculation
Using the published methodology: ceil(mean of Device 4 criteria)) + ceil(mean of System 3 criteria)) + ceil(mean of User 5 criteria)).
- Device CATS: 3
- System CATS: 3
- User CATS: 3
- GRAS: 9; provisional grade: F
- Evidence-consistent outer range before selecting the conservative scenario: 4–9, candidate grades A / A- / B / C / D / F. This is an uncertainty envelope, not a statistical confidence interval.
Criterion assumptions and evidence gaps
| Criterion | Selected CRIS | Candidate scores | Basis |
|---|---|---|---|
| device_known_hardware_tampering | 3 | {1, 2, 3} | Upper-bound assumption; not a demonstrated defect. |
| device_known_vulnerabilties | 3 | {2, 3} | Upper-bound assumption; not a demonstrated defect. |
| device_prior_attacks | 3 | {1, 2, 3} | Upper-bound assumption; not a demonstrated defect. |
| device_updatability | 2 | {1, 2} | Upper-bound assumption; not a demonstrated defect. |
| system_authentication_with_other_systems | 3 | {1, 2, 3} | Upper-bound assumption; not a demonstrated defect. |
| system_communications | 3 | {1, 2, 3} | Upper-bound assumption; not a demonstrated defect. |
| system_storage | 3 | {1, 2, 3} | Upper-bound assumption; not a demonstrated defect. |
| user_authentication_account_management | 2 | {1, 2} | Upper-bound assumption; not a demonstrated defect. |
| user_authentication_authentication | 2 | {1, 2} | Upper-bound assumption; not a demonstrated defect. |
| user_authentication_brute_force_protection | 3 | {1, 2, 3} | Upper-bound assumption; not a demonstrated defect. |
| user_authentication_event_logging | 2 | {1, 2} | Upper-bound assumption; not a demonstrated defect. |
| user_authentication_passwords | 2 | {1, 2} | Upper-bound assumption; not a demonstrated defect. |
Hardware and date limitations
- parent_company: Not established; left blank. 未把品牌所有者、制造商或历史投资人直接等同为母公司；可选字段可暂留空
- release_date: Not established; left blank. 查到2024年2月讨论，但未找到本轮可引用的厂商首发日原文
- status: Not established; left blank. 产品页存在不充分证明指定硬件版本仍在售；销售状态可选，待地区/修订状态确认
- operating_system: UniFi OS / UniFi Network application (version not fixed) OS与应用版本分别记录
- gpu: Not established; left blank. 型号资料未明确GPU型号；不以没有外接显示输出推断没有GPU
- battery: Externally powered; no operating battery specified (RTC backup not assessed) 只描述工作供电方式；不据此断言主板完全没有备份电池
- charging: Not applicable to normal external-power operation 这是有线供电设备的工作充电字段；不涉及给手机充电或PoE输出
- camera: Not established; left blank. 型号手册未明确该硬件；留空而非无证据写None
- sound: Not established; left blank. 型号手册未明确该硬件；留空而非无证据写None
Basic and hardware sources
- UCG-Ultra 官方参数 — Hardware / Overview.
- 网站产品分类 — Subcategories.
- UniFi 更新 — Managing Updates / Release Channels.
Review status
Document review date: 2026-10-25 (Asia/Shanghai). Provisional scenario requested by the submitter. The numerical calculation above is not a claim of administrator approval. The page must be read back after saving; any CAPTCHA, database error, moderation queue, or missing official grade remains an outstanding submission step.
