CVE-2026-109242

7.1High

Published 12 Oct 2026 · NVD status: Undergoing Analysis

7.1High

Attack vector: Network
Complexity: Low
Privileges needed: None
User interaction: Required
Impact: High impact on availability
Weakness: CWE-908

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CVSS v3.1 · CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H

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NVD description

FreeRDP before 3.0.0 and 3.6.0 before 3.32.0 renders uninitialized heap memory from un-decoded progressive tiles because the tile->current buffer is allocated without zeroing. A malicious RDP server can send a crafted WBT_TILE_FIRST then WBT_TILE_UPGRADE sequence to paint heap bytes onscreen or abort the client process.

References

https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-4mpr-hmqx-83q8
https://www.vulncheck.com/advisories/freerdp-before-3.0.0-and-3.6.0-before-3.32.0-uninitialized-heap-disclosure-via-progressive-codec-tile-upgrade
https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-4mpr-hmqx-83q8

Source: nvd.nist.gov/vuln/detail/CVE-2026-109242