Heap-based Buffer Overflow Affecting freerdp/freerdp package, versions [,3.28.0)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Start learning- Snyk IDSNYK-UNMANAGED-FREERDPFREERDP-21192378
- published18 Oct 2026
- disclosed19 Aug 2026
- creditUnknown
Introduced: 19 Aug 2026
CVE-2026-63633 (opens in a new tab)How to fix?
Upgrade freerdp/freerdp to version 3.28.0 or higher.
Overview
Affected versions of this package are vulnerable to Heap-based Buffer Overflow in the freerdp_dsp_decode_opus function when processing Opus audio streams. An attacker can corrupt the heap, crash the client, or potentially execute arbitrary code by sending specially crafted audio data from a malicious RDP server that negotiates WAVE_FORMAT_OPUS with a client built with WITH_OPUS enabled and WITH_DSP_FFMPEG disabled. This is only exploitable if the client is built with WITH_OPUS enabled and WITH_DSP_FFMPEG disabled.