Medium severity · published Oct 12, 2026
CVE-2026-109255
FreeRDP 3.0.0 before 3.32.0 heap buffer overflow via license_check_stream_length
6.8
CVSS
0.5%
EPSS
No
On KEV
Description
FreeRDP 3.0.0 before 3.32.0 contains an integer truncation vulnerability in license_check_stream_length that allows a malicious RDP server to trigger a heap buffer overflow on 32-bit clients. Attackers can send a crafted SERVER_LICENSE_REQUEST with a large scopeCount that bypasses length checks, causing out-of-bounds writes leading to denial of service or remote code execution.
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:H
Attack vector
Network
Complexity
High
Privileges
None
User interaction
Required
Confidentiality
None
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.5% · higher than 45% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
FR
FreeRDP · FreeRDP
3.0.0 before 3.32.0 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-109255
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-109255
vendor-advisory
https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-hxw3-57rq-3v4m
third-party-advisory
https://www.vulncheck.com/advisories/freerdp-3.0.0-before-3.32.0-heap-buffer-overflow-via-license-check-stream-length
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