Medium severity · published Oct 12, 2026
CVE-2026-109256
FreeRDP 3.10.0 through 3.32.2 Heap Buffer Overflow in WinPR PNG Conversion
6.5
CVSS
0.3%
EPSS
No
On KEV
Description
FreeRDP 3.10.0 through 3.32.2 contains a heap buffer overflow in the WinPR png_write_data callback that writes past the buffer after a realloc failure. A malicious RDP clipboard peer can supply a large CF_DIB image that triggers out-of-bounds memcpy during PNG conversion, causing a client crash.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 23% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
FR
FreeRDP · FreeRDP
3.10.0 through 3.32.2 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-109256
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-109256
vendor-advisory
https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-wf3x-658c-52m5
third-party-advisory
https://www.vulncheck.com/advisories/freerdp-3.10.0-through-3.32.2-heap-buffer-overflow-in-winpr-png-conversion
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