CVE•Published 2021-10-29•Modified 2026-07-09•1 article on news•6 live references•NVD data
CVE-2021-31627Tendacn · Ac9_firmware
Vulnerability data via NVD (ingested)
CVSS v3.1
8.8
HIGH
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS percentile
65
Exploit Prediction Scoring System · top 35% of all CVEs
Description
Buffer Overflow vulnerability in Tenda AC9 V1.0 through V15.03.05.19(6318), and AC9 V3.0 V15.03.06.42_multi, allows attackers to execute arbitrary code via the index parameter.
Timeline
Published 2021-10-29
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-2021-31627Hosts Shodan has explicitly fingerprinted as vulnerable.
Shodan · OS
os:"Ac9 Firmware"Hosts Shodan identified as running Ac9 Firmware.
More intel sources (5)
Shodan report
vuln:CVE-2021-31627Country / ASN / product breakdown for the vuln query.
Censys
vulnerabilities.cve_id: CVE-2021-31627Censys host search filtered to this CVE id.
grep.app
CVE-2021-31627Public source-code mentions — fast PoC discovery.
GitHub code
CVE-2021-31627GitHub code search for direct mentions.
Google dork
"CVE-2021-31627" exploit -site:nvd.nist.govWrite-ups and news, NVD excluded.