cvedb.io
CVE-2026-33977
MEDIUM · CVSS 6.5
EPSS exploitation probability: 0%
Published 2026-03-30T22:16:19.117 · Last modified 2026-06-17T10:38:22.243

Summary

FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.24.2, a malicious RDP server can crash the FreeRDP client by sending audio data in IMA ADPCM format with an invalid initial step index value (>= 89). The unvalidated step index is read directly from the network and used to index into a 89-entry lookup table, triggering a WINPR_ASSERT() failure and process abort via SIGABRT. This affects any FreeRDP client that has audio redirection (RDPSND) enabled, which is the default configuration. This issue has been patched in version 3.24.2.

Affected products

freerdp — freerdp

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References

This product uses data from the NVD API but is not endorsed or certified by the NVD. Informational only; not professional security advice.