CVE-2026-121958
High
Description
FreeRDP through 3.32.1 has a heap out-of-bounds write in the RDPGFX client because the delete_surface callback truncates surface hash keys to 16 bits, leaving the surface table inconsistent so HashTable_GetKeys writes past its allocated key array. A malicious or man-in-the-middle RDP server can exploit this by creating surfaceId 0xFFFF, closing the RDPGFX channel, sending repeated DELETESURFACE PDUs, and then sending ENDFRAME or RESETGRAPHICS.
SeverityHigh
CVSS8.8
Exploit probability—
ProductFreeRDP
PublishedNov 4, 2026
First seenNov 4, 2026
Weakness typeCWE-122CWE-122
How to fix
Update
- freerdp freerdp3.32.2 or later
Vendor advisories
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| FreeRDP | v ≤ 3.32.1 | — |
| freerdp freerdp | v < 3.32.2 | 3.32.2 |
Check your version
Choose the product and enter the version you run to see whether it falls in the affected range.
In the Intelligence 360 plan
Attack Surface Management
See the assets tied to your domains, the technologies they run and known vulnerabilities in one list.