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Vulnerability record · CVE-2021-45757 · published 23 March 2022

CVE-2021-45757: Asus rt-ac68u firmware classic buffer overflow vulnerability

Asus · Rt Ac68u Firmware

ASUS AC68U <=3.0.0.4.385.20852 is affected by a buffer overflow in blocking.cgi, which may cause a denial of service (DoS).

7.5 CVSS 3.1 High EPSS 1.1% · top 36.2% CWE-120 · Classic buffer overflow
7.5CVSS 3.1 base score, v2 7.8
1.1%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
2References, 2 tagged exploit
9 Jul 2026Last modified by NVD

Description

ASUS AC68U <=3.0.0.4.385.20852 is affected by a buffer overflow in blocking.cgi, which may cause a denial of service (DoS).

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/IBUILI/Asus ExploitThird Party Advisory
https://github.com/IBUILI/Asus ExploitThird Party Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2021-45756Asus rt-ac68u firmware classic buffer overflow vulnerabilityAsus 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.EPSS 1.2%9.8CVE-2018-9285Asus rt-ac66u firmware os command injection vulnerabilityMain_Analysis_Content.asp in /apply.cgi on ASUS RT-AC66U, RT-AC68U, RT-AC86U, RT-AC88U, RT-AC1900, RT-AC2900, and RT-AC3100 devices before 3.0.0.4.38…EPSS 3.6%9.1CVE-2021-37315Asus rt-ac68u firmware vulnerabilityIncorrect Access Control issue discoverd in Cloud Disk in ASUS RT-AC68U router firmware version before 3.0.0.4.386.41634 allows remote attackers to w…EPSS 1.1%9.1CVE-2021-37317Asus rt-ac68u firmware path traversal vulnerabilityDirectory Traversal vulnerability in Cloud Disk in ASUS RT-AC68U router firmware version before 3.0.0.4.386.41634 allows remote attackers to write ar…EPSS 1.5%9.0CVE-2021-43702Asus zenwifi xd4s firmware cross-site scripting vulnerabilityASUS RT-A88U 3.0.0.4.386_45898 is vulnerable to Cross Site Scripting (XSS). The ASUS router admin panel does not sanitize the WiFI logs correctly, if…EPSS 0.98%8.5CVE-2013-5948T-mobile tm-ac1900 os command injection vulnerabilityThe Network Analysis tab (Main_Analysis_Content.asp) in the ASUS RT-AC68U and other RT series routers with firmware before 3.0.0.4.374.5047 allows re…EPSS 9.5%7.5CVE-2021-37316Asus rt-ac68u firmware sql injection vulnerabilitySQL injection vulnerability in Cloud Disk in ASUS RT-AC68U router firmware version before 3.0.0.4.386.41634 allows remote attackers to view sensitive…EPSS 1.0%7.5CVE-2021-3128Asus zenwifi ax \(xt8\) firmware vulnerabilityIn ASUS RT-AX3000, ZenWiFi AX (XT8), RT-AX88U, and other ASUS routers with firmware < 3.0.0.4.386.42095 or < 9.0.0.4.386.41994, when IPv6 is used, a …EPSS 2.2%

Source: NIST National Vulnerability Database (record CVE-2021-45757), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.