High severity · published Oct 21, 2026
CVE-2026-114045
FreeRDP before 3.32.1 Heap Buffer Overflow via rdpsnd_server_select_format
8.8
CVSS
0.6%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.6% · higher than 47% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
FR
FreeRDP · FreeRDP
before 3.32.1 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-114045
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-114045
github.com
https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-3m9q-g533-rqjq
www.vulncheck.com
https://www.vulncheck.com/advisories/freerdp-before-3.32.1-heap-buffer-overflow-via-rdpsnd-server-select-format
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