CVE-2026-36610

Description

Mercusys AC12G (EU) V1 with firmware AC12G(EU)_V1_200909 transmits DDNS credentials over plaintext HTTP with only Base64 encoding. The firmware contains no TLS implementation, allowing man-in-the-middle interception of DDNS service credentials.

Is your site exposed to CVE-2026-36610?

Run a free security scan — no signup, results in seconds.

CVSS v3.1 Score

5.9

MEDIUM

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

EPSS — Exploit Prediction

0.0015

Probability of exploitation

0.04%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Weakness Type (CWE)

CWE-319 CWE-319

CWE-523 CWE-523

References

Other References

https://github.com/Tymbark7372/MERCUSYS-AC12G/blob/master/advisories/CVE-2026-36610.md

Frequently Asked Questions

What is CVE-2026-36610? +

Mercusys AC12G (EU) V1 with firmware AC12G(EU)_V1_200909 transmits DDNS credentials over plaintext HTTP with only Base64 encoding. The firmware contains no TLS implementation, allowing man-in-the-middle interception of DDNS service credentials. It has a CVSS v3.1 base score of 5.9 (MEDIUM).

How severe is CVE-2026-36610? +

CVE-2026-36610 has a CVSS v3.1 score of 5.9 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance. The EPSS score is 0.0015, placing it in the 0th percentile for exploitation probability.

How do I check if I'm vulnerable to CVE-2026-36610? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

Related Vulnerabilities

CVE-2026-45432

This vulnerability exists in GX Earth ONT models due to the transmission of user credentials in plaintext over HTTP in …

CVE-2026-25608

STER uses unencrypted TCP traffic to transmit data over the network. It allows an attacker to conduct a Man-In-The-Middle attack …

CVE-2026-42514

This vulnerability exists in e-Sushrut due to exposure of OTPs in plaintext within API responses. A remote attacker could exploit …

CVE-2025-0631

A Credential Exposure Vulnerability exists in the above-mentioned product and version. The vulnerability is due to using HTTP resulting in …

CVE-2025-42603

This vulnerability exists in the Meon KYC solutions due to transmission of sensitive data in plain text within the response …

CVE-2025-47419

Cleartext Transmission of Sensitive Information vulnerability in Crestron Automate VX allows Sniffing Network Traffic. The device allows Web UI and …