CVE-2026-33983: Freerdp

Medium severity, CVSS 6.5. EPSS: 0.8% chance of exploitation in the next 30 days.

FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.24.2, progressive_decompress_tile_upgrade() detects a mismatch via progressive_rfx_quant_cmp_equal() but only emits WLog_WARN, execution continues. The wrapped value (247) is used as a shift exponent, causing undefined behavior and an approximately 80 billion iteration loop (CPU DoS). This issue has been patched in version 3.24.2.

Affected products

• Freerdp Freerdp: before 3.24.2 (fixed in 3.24.2)

Published 2026-03-30. Last modified 2026-07-15.