CVE-2026-36611
High
Description
Mercusys AC12G (EU) V1 with firmware AC12G(EU)_V1_200909 returns 128 bytes of uninitialized buffer when receiving POST requests without SOAPAction header on UPnP port 1900, exposing internal memory to unauthenticated adjacent network attackers.
SeverityHigh
CVSS7.3
Exploit probability—
ProductAC12G (EU) V1
PublishedJun 3, 2026
First seenJun 3, 2026
Weakness typeCWE-200Sensitive information exposure
How to fix
Sources list no fixed version or patch link for this vulnerability.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Mercusys AC12G (EU) V1 | AC12G(EU)_V1_200909 | — |
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