Review reviewCritical

CVE-2021-45756

rt-ac68u firmware, rt-ac68u

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.

CVSS
9.8
EPSS
1.21%
65.5% percentile
CISA KEV
Not listed
Published
2022.03.23
PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability1.21%
Technical severityCVSS 9.8

Vulnerability overview

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.

Affected product and versions

Product
rt-ac68u firmware, rt-ac68u
Affected versions
< 3.0.0.4.385.20633, < 3.0.0.4.384.82072
Fixed versions
3.0.0.4.385.20633, 3.0.0.4.384.82072

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
  1. 1
    Identify

    Confirm that rt-ac68u firmware, rt-ac68u and an affected version are present.

  2. 2
    Prioritize

    Combine exploitation signals with asset exposure and business criticality.

  3. 3
    Remediate

    Follow the vendor advisory or supported update path and preserve rollback options.

  4. 4
    Verify

    Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CWE
CWE-120