What is CVE-2021-45757?

CVE-2021-45757 is a high-severity vulnerability in ASUS Rt-Ac68u, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 7.5/10. Published 2022-03-23.

How severe is CVE-2021-45757?

High severity. CVSS v3 base score is 7.5 out of 10.

Buffer overflow in ASUS Rt-Ac68u

CVE-2021-45757

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).

Vulnerability class: Buffer Overflow

Published 2022-03-23 · last modified 2026-07-09.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.011 (64.7th percentile), scored 2026-10-20.

Low probability of exploitation in the next 30 days, but still tracked. 65th percentile — 64.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.011 · newest: 0.011 · change: 0.000

Affected products

Weakness classification (CWE)

CWE-120 — Buffer Copy without Checking Size of Input (Classic Buffer Overflow)

References

af854a3a-2127-422b-91ae-364da2661108 (Vendor Advisory)
github.com/IBUILI/Asus (Exploit, Third Party Advisory)
af854a3a-2127-422b-91ae-364da2661108 (URL Repurposed, Broken Link)

Frequently asked questions

What is CVE-2021-45757?: CVE-2021-45757 is a high-severity vulnerability in ASUS Rt-Ac68u, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 7.5/10. Published 2022-03-23.
How severe is CVE-2021-45757?: High severity. CVSS v3 base score is 7.5 out of 10.