What’s Vulnerable › Vulnerabilities

CVE-2026-114045: FreeRDP before 3.32.1 Heap Buffer Overflow via rdpsnd_server_select_format

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.6% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-10-21 · updated 2026-10-22
• Weakness: CWE-122

Description

FreeRDP before 3.32.1 contains a heap-based buffer overflow in the server-side rdpsnd channel because an integer wraparound in rdpsnd_server_select_format() DVI_ADPCM block-alignment arithmetic bypasses validation. A malicious RDP client can send two SNDC_FORMATS PDUs with an nBlockAlign too small for nChannels, causing an unbounded heap write during server audio playback, potentially enabling code execution.

Affected products

• FreeRDP: before 3.32.1 — fixed in 3.32.1

How to fix

Upgrade to a fixed version: FreeRDP 3.32.1. Check the vendor advisory for mitigations.

References

• https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-3m9q-g533-rqjq
• https://www.vulncheck.com/advisories/freerdp-before-3.32.1-heap-buffer-overflow-via-rdpsnd-server-select-format

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