CVE-2021-45757 Memory corruption in n/a

Q: Is CVE-2021-45757 being exploited?

There is no known exploitation of CVE-2021-45757 in the wild and no public exploit code.

Q: How do I fix CVE-2021-45757?

No fix has been published for CVE-2021-45757 yet. Limit exposure of the affected software until one is available.

High 7.5 Published 23 Mar 2022 Updated 9 Jul 2026

A buffer overflow in the blocking.cgi script of ASUS AC68U routers allows attackers to cause a denial of service.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2021-45757?

CVE-2021-45757 is a high-severity memory corruption vulnerability in n/a, published on 23 Mar 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official 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).

Weakness: CWE-120

Which versions are affected by CVE-2021-45757?

It affects 1 product.

Products include Asus Rt-Ac68u Firmware.

How do I fix CVE-2021-45757?

No fix has been published for CVE-2021-45757 yet. Limit exposure of the affected software until one is available.

Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.

Is CVE-2021-45757 being exploited?

There is no known exploitation of CVE-2021-45757 in the wild and no public exploit code.

Sources

Also known as GHSA-fhfv-jcfj-9cg7.