ASUS RT-AX55

ASUS RT-AX55
Security Grade B Calculator v	ASUS RT-AX55 Brand: ASUS (Parent: ASUSTeK Computer Inc.) Category: Router • Model / Gen: AX1800 Wi-Fi 6 RT-AX55 Release Date: 2021-01-22 • Status: In sale Classification Date: • Official Website

Security Evaluation

1. Device Security

Criterion	Value	Proof	Comment
Known hardware tampering	Rare	[1] 🔗 Proof	External power, reset and Ethernet interfaces permit interruption or reset with physical access; internal changes require enclosure access. Rare is an assessor inference, not a measured incident frequency.
Known vulnerabilities	Rare	[2] [3] 🔗 Proof	Published historical RT-AX55 management vulnerabilities exist; affected builds and patched later releases must be distinguished. Rare is a provisional qualitative mapping pending a common observation window, not measured prevalence.
Prior attacks	Rare	[4] 🔗 Proof	A real ASUS router compromise campaign was reported. Related historical exploitation was reproduced on RT-AX55; the campaign-wide device count is not a model-specific infection count. Rare is a qualitative mapping.
Updatability	Very common	🔗 Proof	ASUS 固件持续更新
Category Score	Score: 2 / 3

2. System Security

Criterion	Value	Proof	Comment
Authentication with other systems	Partial	🔗 Proof	Administration uses credentials; ordinary DHCP, DNS and discovery paths do not establish universal peer authentication. Partial is a service-scope assessment, not a claim of mutual authentication on every interface.
Communications	Encrypted with up-to-date encryption	[5] 🔗 Proof	Conditional supported-configuration assessment: HTTPS administration and WPA3-Personal or WPA2-AES; disable plaintext remote administration and Telnet. Other traffic and actual enabled settings were not inspected.
Storage	Encrypted with up-to-date encryption	[6] 🔗 Proof	At-rest encryption of configuration and credentials on 3.0.0.4.386_53370 is unverified. Published older-firmware extraction is indirect evidence only.
Category Score	Score: 2 / 3

3. User Authentication

Criterion	Value	Proof	Comment
Account management	Full	🔗 Proof	Router administrator credential changes are documented. Creation and deletion of lower-privilege local management accounts have not been established; an ASUS cloud account alone does not substantiate Full local account management.
Authentication	Basic	🔗 Proof	管理密码为主
Brute-force protection	Basic	🔗 Proof	ASUS documents CAPTCHA after repeated errors and a warning after five incorrect logins. RT-AX55 build-specific applicability and duration have not been verified.
Event logging	Access event logged	[7] [8] 🔗 Proof	Network logs are documented. Historical build 52332 login-event coverage was disputed; 53370 changes logging data handling but does not specify administrator access-event coverage. Current-build access logging remains unverified.
Passwords	Require change after setup	[9] 🔗 Proof	The model quick-start guide creates a router login password. Firmware 3.0.0.4.386_53244 introduced a 10-character minimum; ASUS recommends a factory reset to apply enhancements. Mixed-character complexity enforcement is not established.
Category Score	Score: 2 / 3

Technical Specifications

Property	Details
Operating System & App	ASUS stock firmware; reviewed release 3.0.0.4.386_53370, 2026-09-04; installation unknown. (Companion App: ASUS Router app; web management also available)
Hardware (CPU / GPU)	CPU: 1.5 GHz quad-core • GPU: Not applicable (networking SoC; no GPU)
Memory & Storage	Memory: 256 MB RAM • Storage: 128 MB flash
Power, Battery & Charging	Battery: Not applicable (mains-powered via external adapter) • Power: AC input 110–240 V 50–60 Hz; DC output 12 V, max. 1 A • Charging: Not applicable
Display & Camera	Display: Not applicable (LED indicators only: Power, 2.4G, 5G, LAN, WAN) • Camera: Not applicable
Sound & Connectivity	Sound: Not applicable (no built-in speaker) • Connectivity: Dual-band 2.4/5 GHz Wi-Fi 6; 1 Gigabit WAN; 4 Gigabit LAN
Physical (Dimensions & Mass)	Dimensions: 230 x 134 x 56 mm • Mass: 374 g

The RT-AX55 is an entry-level dual-band Wi-Fi 6 (AX1800) home router running ASUSWRT, assessed from its official tech-spec sheet, the ASUS PSIRT advisory index and the first-edition user manual dated March 2021, verified 2026-10-25. Dating is treated as an announcement window because no dedicated launch press release was located. Classification covers the stock web-UI and app management plane; AiMesh mode and USB-less hardware are out of scope. No model-specific incident history was enumerated.