Vulnerability · Published Sep 16, 2026 · Assigned by FERMAX
CVE-2026-86474Improper Certificate Validation in the Firmware Download vulnerability
High 7.7
In plain English
A high-severity improper certificate validation in DUOX PLUS monitor firmware (VEO Wi-Fi range) from Fermax Electronica S.A.U.. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.1% (higher than 2% of all known vulnerabilities).
Severity (CVSS 4.0)7.7High
Exploit odds (30 days)0.1%top 97.8% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
The lack of TLS certificate validation when downloading firmware updates in VEO and VEO-XS Wi-Fi monitors, in versions prior to 01.48.001, allows an attacker to perform man-in-the-middle attacks on the update channel.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Fermax Electronica S.A.U. | DUOX PLUS monitor firmware (VEO Wi-Fi range) | 0 – before 01.48.001 |
Weakness: CWE-295 · Vector: CVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
References
- Fermax security advisories vendor-advisory