CVE-2026-91945: Freerdp

Medium severity, CVSS 6.5. EPSS: 0.6% chance of exploitation in the next 30 days.

FreeRDP versions before 3.31.0 contain an out-of-bounds read vulnerability in smartcard response decoders that fail to validate ATR length fields against fixed inline arrays. Authenticated RDP clients can send oversized ATR lengths in PAKID_CORE_DEVICE_IOCOMPLETION responses to trigger reads past stack or heap objects, causing process termination.

Affected products

• Freerdp Freerdp: from 3.28.0, before 3.31.0 (fixed in 3.31.0)

Published 2026-09-15. Last modified 2026-09-24.