CVE-2026-121952

CriticalCVSS 9.8/10Last modified Nov 5, 2026

Description

FreeRDP before 3.32.2 has an out-of-bounds write in the proxy because rdp_read_bitmap_cache_v2_capability_set rejects only numCellCaches values above 5, yet the bitmap cache v2 cell array is later accessed at fixed indices 0 through 4. A client connecting to the proxy can declare fewer than five cell caches in its Confirm Active, causing heap corruption, heap data leakage to the backend, or a crash.

Metrics

CVSS 3.1 9.8/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weakness enumeration

CWE-787

Affected software

VendorProductVersions
FreeRDPFreeRDP< 3.32.2

References

Timeline

Published
Nov 4, 2026
Last modified
Nov 5, 2026
NVD status
Analyzed

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CVE-2026-121952: Critical severity, CVSS 9.8 | Vulnix