Medium severity · published Oct 13, 2026
CVE-2026-109680
FreeRDP 3.18.0 before 3.32.0 Heap Out-of-Bounds Write via ARM Redirected Username
6.5
CVSS
0.3%
EPSS
No
On KEV
Description
FreeRDP 3.18.0 before 3.32.0 has a heap-based out-of-bounds write in freerdp_interruptible_get_line, which shrinks the buffer to 32 bytes while keeping a pre-filled suggested username's length as its write offset. A malicious or compromised ARM routing service can return a long redirectedUsername that reaches the CLI credential prompt, crashing the client when the user types input.
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
3.18.0 before 3.32.0 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-109680
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-109680
vendor-advisory
https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-4ww8-3vqm-jgcf
third-party-advisory
https://www.vulncheck.com/advisories/freerdp-3.18.0-before-3.32.0-heap-out-of-bounds-write-via-arm-redirected-username
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