CVE-2026-22852CRITICAL 9.8EPSS p28.2%

CVE-2026-22852CVE-2026-22852

Description

FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.20.1, a malicious RDP server can trigger a heap-buffer-overflow write in the FreeRDP client when processing Audio Input (AUDIN) format lists. audin_process_formats reuses callback->formats_count across multiple MSG_SNDIN_FORMATS PDUs and writes past the newly allocated formats array, causing memory corruption and a crash. This vulnerability is fixed in 3.20.1.

Scoring

CVSS 3.19.8 (CRITICAL)
VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS0.36% probability of exploitation · percentile 28.2% · 2026-06-18T12:00:27Z
Published2026-01-14
Last modified2026-01-20

Underlying weaknesses· 1

CWE-787

References

  1. https://github.com/FreeRDP/FreeRDP/releases/tag/3.20.1
  2. https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-9chc-g79v-4qq4

1

TypeTargetConfidenceTier
WeaknessOut-of-bounds Writecwe-7870%live

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Sourced from NVD + FIRST.org EPSS. Curated for EU compliance use cases by Adam Lundqvist, Founder at SQUR.