CVE-2021-32030KEV · OVERDUE

ASUS Routers Improper Authentication Vulnerability

Critical · published May 6, 2021

Patch now

Confirmed exploited, and the score agrees

CVSS calls it critical at 9.8. It is confirmed in active exploitation. It sits in the 99.9th percentile for exploit probability.

487
days past CISA
deadline
CVSS v3.1
9.8
EPSS
99%
Percentile
99.9
In the wild
Confirmed
What it is

🚨 An unauthenticated user can waltz right into the ASUS GT-AC2900 admin panel with just a sneaky input! 🔥 Think of it like a hotel with a lobby door that anyone can push open, bypassing the check-in desk entirely. An attacker can slip in and access rooms they shouldn’t, just like accessing the admin interface without a password! This vulnerability allows attackers to gain full administrative access, potentially changing settings, viewing sensitive information, or even taking control over your entire network. It could lead to absolutely devastating consequences, putting your data and security at serious risk!

Put simply

Think of it like a hotel with a lobby door that anyone can push open, bypassing the check-in desk entirely. An attacker can slip in and access rooms they shouldn’t, just like accessing the admin interface without a password! This authentication bypass occurs because an attacker can send a specific '' value that matches the expected value, tricking the admin interface into granting access without proper authentication. The flaw resides in the handling of remote input on affected ASUS devices.

What to do

This vulnerability allows attackers to gain full administrative access, potentially changing settings, viewing sensitive information, or even taking control over your entire network. It could lead to absolutely devastating consequences, putting your data and security at serious risk! Patch your ASUS GT-AC2900 devices immediately to version 3.0.0.4.386.42643 or later. If you can't update, disable remote access features from the WAN to mitigate the risk. Don't leave your network's door wide open! You've got this! Follow these steps, and you’ll take back control and secure your device in no time. 🛡️

The record
Technical detail
CVSS v3.1
9.8 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.99393 · 99.9th percentile
Published
2021-05-06T14:54Z
KEV added
2025-06-02 · due 2025-06-23
EPSS history
Timeline
  • 02 JUN 00:00Z
    Added to CISA KEV — remediate by Jun 23
    kev
  • 06 MAY 14:54Z
    The administrator application on ASUS GT-AC2900 devices before 3.0.0.4.386.42643 and Lyra Mini before 3.0.0.4_384_46630 allows authentication bypass when…
    cvelistv5