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BIOS & FIRMWARE

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Firmware
ASUS RT-AC51U Firmware version 3.0.0.4.380.8591
Version 3.0.0.4.380.8591
14.01 MB
2020/09/22

This model was end of its life, and its firmware, utility, website, and manual will no longer be updated. For more details, please refer to https://www.asus.com/event/network/eol-product/

- Fixed stored XSS vulnerability
- Fixed buffer overflow vulnerability

The update server transport layer security was upgraded and the old protocol was removed.
Please refer to http://asus.me/firmwareen to update the firmware.

Please unzip the firmware file first then check the MD5 code.
MD5: cf231627d7c337848bba2aa6b93360b7

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ASUS RT-AC51U Firmware version 3.0.0.4.380.8497
Version 3.0.0.4.380.8497
13.89 MB
2019/11/06

Fixed a DDoS vulnerability

Please unzip the firmware file first then check the MD5 code.
MD5: a541a9b1fe081b68a4c4b5a0d47f06f2

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ASUS RT-AC51U Firmware version 3.0.0.4.380.8539
Version 3.0.0.4.380.8539
Beta Version
14.07 MB
2019/11/06

Support repeater mode

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ASUS RT-AC51U Firmware version 3.0.0.4.380.8496
Version 3.0.0.4.380.8496
13.89 MB
2019/05/17

Security Fix
- Fixed DDoS vulnerability.
- Fixed AiCloud vulnerability. Thanks for Matt Cundari's contribution.
- Fixed command injection vulnerability. Thanks for S1mba Lu's contribution.
- Fixed buffer overflow vulnerability. Thanks for Javier Aguinaga's contribution.
- Fixed CVE-2018-20334
- Fixed CVE-2018-20336
- Fixed null pointer issue. Thanks for CodeBreaker of STARLabs’ contribution.
- Fixed AiCloud buffer overflow vulnerability. Thanks for Resecurity International's contribution.

Please unzip the firmware file first then check the MD5 code.
MD5: e72758ed54d4a0113804f8fe7d5f14d5

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ASUS RT-AC51U Firmware version 3.0.0.4.380.8457
Version 3.0.0.4.380.8457
13.67 MB
2019/01/21

Security fixes:
- Fixed Reflected XSS vulnerability.
- Fixed CSRF vulnerability.
- Fixed command injection vulnerability.
- Fixed stack buffer overflow vulnerability.
Thanks for Rick Ramgattie contribution.

Please unzip the firmware file first then check the MD5 code.
MD5:780b381bf9236b08ded2a41ef98d5862

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ASUS RT-AC51U Firmware version 3.0.0.4.380.8376
Version 3.0.0.4.380.8376
13.66 MB
2018/08/24

Fixed the bug which client list show incorrectly on APP.

Please unzip the firmware file first then check the MD5 code.
MD5: 097324c1704c97e0bd246a29de2a0208

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ASUS RT-AC51U Firmware version 3.0.0.4.380.8355
Version 3.0.0.4.380.8355
14.5 MB
2018/08/01

- Modified Quick Internet Setup wizard process.
- Modified the EULA for DDNS.
- Fixed NTP time zone synchronization bug.
- Main SSID and guest network can hide independently.

Please unzip the firmware file first then check the MD5 code.
MD5: 412c1fee20a45a4311cc9fc0fbabb81b

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ASUS RT-AC51U Firmware version 3.0.0.4.380.8282
Version 3.0.0.4.380.8282
13.74 MB
2018/05/21

- Improved system stability.
- Fixed XSS vulnerability. Thanks to Yonghui Han of Fortinet's FortiGuard Labs.
- Fixed CVE-2018-8877, CVE-2018-8878, CVE-2018-8879
- Fixed plain text password vulnerability in lighttpd.
- Fixed AiCloud login bugs.
- Modified Quick Internet Setup wizard process.


Please unzip the firmware file first then check the MD5 code.
MD5: 03c2325e54ea76b5e3c5cfdf657f7c0b

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