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CVE-2026-36608

Mercusys AC12G (EU) V1 router with firmware AC12G(EU)_V1_200909 allows UPnP AddPortMapping to forward external ports to the router's own admin interface by accepting its own IP (192.168.1.1) or localhost (127.0.0.1) as InternalClient. An unauthenticated LAN attacker can expose the admin panel to the internet with a single SOAP request.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:a7386b68af79d97751c89d3d76efad78764e4e65fbced0d5f4eeaf9f5a5cec81
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

cwe · 2 assertions

{"cweId":"CWE-441","description":"CWE-441 Unintended Proxy or Intermediary ('Confused Deputy')","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:10c586b77146baa66480be78a47bde7014044022e3e01d3f539dab20f4d0eb5a · sha256:338286adca71df32… · /containers/adp/0/problemTypes/0/descriptions/0

{"description":"n/a","lang":"en","type":"text"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:10c586b77146baa66480be78a47bde7014044022e3e01d3f539dab20f4d0eb5a · sha256:338286adca71df32… · /containers/cna/problemTypes/0/descriptions/0

Affected products and versions

1 source assertion
{"product":"n/a","vendor":"n/a","versions":[{"status":"affected","version":"n/a"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:10c586b77146baa66480be78a47bde7014044022e3e01d3f539dab20f4d0eb5a · sha256:338286adca71df32… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackVector":"ADJACENT_NETWORK","availabilityImpact":"HIGH","baseScore":8.8,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:10c586b77146baa66480be78a47bde7014044022e3e01d3f539dab20f4d0eb5a · sha256:338286adca71df32… · /containers/adp/0/metrics/0/cvssV3_1

CWE assertions

2 source assertions
{"cweId":"CWE-441","description":"CWE-441 Unintended Proxy or Intermediary ('Confused Deputy')","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:10c586b77146baa66480be78a47bde7014044022e3e01d3f539dab20f4d0eb5a · sha256:338286adca71df32… · /containers/adp/0/problemTypes/0/descriptions/0
{"description":"n/a","lang":"en","type":"text"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:10c586b77146baa66480be78a47bde7014044022e3e01d3f539dab20f4d0eb5a · sha256:338286adca71df32… · /containers/cna/problemTypes/0/descriptions/0

Source references

1 source assertion
{"url":"https://github.com/Tymbark7372/MERCUSYS-AC12G/blob/master/advisories/CVE-2026-36608.md"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:10c586b77146baa66480be78a47bde7014044022e3e01d3f539dab20f4d0eb5a · sha256:338286adca71df32… · /containers/cna/references/0

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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