Is CVE-2026-121392 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-121392?

CVE-2026-121392 has a CVSS v3 severity of HIGH (7.4).

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CVE-2026-121392

Description

FreeRDP before 3.32.2 contains an improper certificate validation vulnerability in tls_verify_certificate() that accepts Common Name fallback despite non-matching SAN entries and matches IP literals against DNS strings. Man-in-the-middle attackers holding a certificate from a client-trusted CA can bypass server identity checks to intercept RDP sessions, including keystrokes, clipboard, and screen content.