CVE-2026-63117

mediumCVSS 6.5covered by 1 sourcefirst seen 2026-08-19

FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.28.0, an authenticated RDP client can advertise DVI ADPCM with nBlockAlign equal to 8 and nChannels equal to 2 to make the bs calculation in rdpsnd_server_select_format in channels/rdpsnd/server/rdpsnd_main.c equal zero. The subsequent out_frames modulo bs operation raises SIGFPE and terminates the server-side rdpsnd channel process. This vulnerability fixed in 3.28.0.

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Exploitation outlook

Low exploitation risk0.39% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 32% of all EPSS-scored CVEs.

Advisory coverage (1)

mediumCVE-2026-63117: FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.28.0, an authentic…nvd · 2026-08-19

External references

NVD record for CVE-2026-63117

CVE.org record

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