CVE•Published 2026-06-03•Modified 2026-07-22•1 article on news•4 live references•NVD data
CVE-2026-36603
Vulnerability data via NVD (ingested)
CVSS v3.1
8.1
HIGH
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
EPSS percentile
11
Exploit Prediction Scoring System · top 89% of all CVEs
Weaknesses (CWE)
Description
Mercusys AC12G (EU) V1 router with firmware AC12G(EU)_V1_200909 exposes 15 of 18 UPnP IGD actions without authentication on port 1900, including AddPortMapping and GetExternalIPAddress. UPnP is enabled by default through the admin interface, allowing any unauthenticated LAN device to create arbitrary port forwarding rules and access WAN traffic statistics.
Timeline
Published 2026-06-03
Modified 2026-07-22
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).
More intel sources (5)
Shodan report
vuln:CVE-2026-36603Country / ASN / product breakdown for the vuln query.
Censys
vulnerabilities.cve_id: CVE-2026-36603Censys host search filtered to this CVE id.
grep.app
CVE-2026-36603Public source-code mentions — fast PoC discovery.
GitHub code
CVE-2026-36603GitHub code search for direct mentions.
Google dork
"CVE-2026-36603" exploit -site:nvd.nist.govWrite-ups and news, NVD excluded.