CVE•Published 2022-03-23•Modified 2026-07-09•1 article on news•4 live references•NVD data
CVE-2021-45756Asus · Rt-ac68u_firmware
Vulnerability data via NVD (ingested)
CVSS v3.1
9.8
CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS percentile
75
Exploit Prediction Scoring System · top 25% of all CVEs
Description
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.
Timeline
Published 2022-03-23
Modified 2026-07-09
External references
Search for exposed instances
Shodan + Censys queries derived from NVD's CPE data. The vuln tag catches assets Shodan has explicitly linked to this CVE; the product / banner fingerprints find exposed instances even when the vuln tag was never applied (which is common).
Shodan · vuln tag0 hosts
vuln:CVE-2021-45756Hosts Shodan has explicitly fingerprinted as vulnerable.
Shodan · OS
os:"Rt-ac68u Firmware"Hosts Shodan identified as running Rt-ac68u Firmware.
More intel sources (5)
Shodan report
vuln:CVE-2021-45756Country / ASN / product breakdown for the vuln query.
Censys
vulnerabilities.cve_id: CVE-2021-45756Censys host search filtered to this CVE id.
grep.app
CVE-2021-45756Public source-code mentions — fast PoC discovery.
GitHub code
CVE-2021-45756GitHub code search for direct mentions.
Google dork
"CVE-2021-45756" exploit -site:nvd.nist.govWrite-ups and news, NVD excluded.
Known PoCs on GitHub
No public proof-of-concept repositories found for CVE-2021-45756 on GitHub.