9.8
CRITICAL
CVE-2021-45756
Asus Router Buffer Overflow Vulnerability
Description

Asus RT-AC68U <3.0.0.4.385.20633 and RT-AC5300 <3.0.0.4.384.82072 are affected by a buffer overflow in blocking_request.cgi.

INFO

Published Date :

March 23, 2022, 11:15 a.m.

Last Modified :

Feb. 14, 2024, 1:17 a.m.

Remotely Exploitable :

Yes !

Impact Score :

5.9

Exploitability Score :

3.9
Affected Products

The following products are affected by CVE-2021-45756 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Asus rt-ac5300_firmware
2 Asus rt-ac68u_firmware
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2021-45756.

URL Resource
http://asus.com Vendor Advisory
http://rt-ac68u.com Broken Link URL Repurposed
https://github.com/IBUILI/Asus Exploit Third Party Advisory

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2021-45756 vulnerability anywhere in the article.

The following table lists the changes that have been made to the CVE-2021-45756 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • CVE Modified by [email protected]

    May. 14, 2024

    Action Type Old Value New Value
  • Initial Analysis by [email protected]

    Mar. 29, 2022

    Action Type Old Value New Value
    Added CVSS V2 NIST (AV:N/AC:L/Au:N/C:P/I:P/A:P)
    Added CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
    Changed Reference Type http://asus.com No Types Assigned http://asus.com Vendor Advisory
    Changed Reference Type http://rt-ac68u.com No Types Assigned http://rt-ac68u.com Broken Link
    Changed Reference Type https://github.com/IBUILI/Asus No Types Assigned https://github.com/IBUILI/Asus Exploit, Third Party Advisory
    Added CWE NIST CWE-120
    Added CPE Configuration AND OR *cpe:2.3:o:asus:rt-ac68u_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 3.0.0.4.385.20633 OR cpe:2.3:h:asus:rt-ac68u:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:asus:rt-ac5300_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 3.0.0.4.384.82072 OR cpe:2.3:h:asus:rt-ac5300:-:*:*:*:*:*:*:*
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2021-45756 is associated with the following CWEs:

Exploit Prediction

EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.

0.55 }} 0.09%

score

0.77872

percentile

CVSS31 - Vulnerability Scoring System
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
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