What is CVE-2021-45756?

CVE-2021-45756 is a critical-severity vulnerability in Asus Rt-ac5300, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 9.8/10. Published 2022-03-23.

How severe is CVE-2021-45756?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Buffer overflow in Asus Rt-ac5300

CVE-2021-45756

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.

Vulnerability class: Buffer Overflow

EPSS: 0.012 (65.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Weakness classification (CWE)

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

References

af854a3a-2127-422b-91ae-364da2661108 (x_refsource_MISC, Vendor Advisory)
af854a3a-2127-422b-91ae-364da2661108 (URL Repurposed, x_refsource_MISC, Broken Link)
cve@mitre.org (Exploit, Third Party Advisory, x_refsource_MISC)

Frequently asked questions

What is CVE-2021-45756?: CVE-2021-45756 is a critical-severity vulnerability in Asus Rt-ac5300, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 9.8/10. Published 2022-03-23.
How severe is CVE-2021-45756?: Critical severity. CVSS v3 base score is 9.8 out of 10.