CVE-2026-22853
Critical
Description
FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.20.1, RDPEAR’s NDR array reader does not perform bounds checking on the on‑wire element count and can write past the heap buffer allocated from hints, causing a heap buffer overflow in ndr_read_uint8Array. This vulnerability is fixed in 3.20.1.
SeverityCritical
CVSS9.8
Exploit probability56. percentile0.8%
ProductFreerdp
PublishedJan 14, 2026
First seenJan 14, 2026
Weakness typeCWE-787Out-of-bounds write
How to fix
Update
- freerdp freerdp3.20.1 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| freerdp freerdp | v < 3.20.1 | 3.20.1 |
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