CVE•Published 2025-10-27•Modified 2026-10-08•1 article on news•6 live references•NVD data
CVE-2025-12240Totolink · A3300r_firmware
Vulnerability data via NVD (ingested)
CVSS v3.1
8.8
HIGH
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS percentile
56
Exploit Prediction Scoring System · top 44% of all CVEs
Weaknesses (CWE)
Description
A security vulnerability has been detected in TOTOLINK A3300R 17.0.0cu.557_B20221024. This affects the function setDmzCfg of the file /cgi-bin/cstecgi.cgi. The manipulation of the argument ip leads to buffer overflow. It is possible to initiate the attack remotely. The exploit has been disclosed publicly and may be used.
Timeline
Published 2025-10-27
Modified 2026-10-08
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-2025-12240Hosts Shodan has explicitly fingerprinted as vulnerable.
Shodan · OS
os:"A3300r Firmware"Hosts Shodan identified as running A3300r Firmware.
More intel sources (5)
Shodan report
vuln:CVE-2025-12240Country / ASN / product breakdown for the vuln query.
Censys
vulnerabilities.cve_id: CVE-2025-12240Censys host search filtered to this CVE id.
grep.app
CVE-2025-12240Public source-code mentions — fast PoC discovery.
GitHub code
CVE-2025-12240GitHub code search for direct mentions.
Google dork
"CVE-2025-12240" exploit -site:nvd.nist.govWrite-ups and news, NVD excluded.