CVE-2026-109680

MEDIUM 5.3

FreeRDP 3.18.0 before 3.32.0 Heap Out-of-Bounds Write via ARM Redirected Username

CVSS Score

5.3

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-787
Vendor	freerdp
Product	freerdp
Published	Oct 13, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:H

Attack Vector

Network

Attack Complexity

High

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Affected Versions

FreeRDP / FreeRDP

3.18.0 < 3.32.0

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-4ww8-3vqm-jgcf vulncheck.com: https://www.vulncheck.com/advisories/freerdp-3.18.0-before-3.32.0-heap-out-of-bounds-write-via-arm-redirected-username

Credits

Kushalkhemka opensec-intelligence mayank-jangid-moon skigeek16