Critical severity · published Jan 14, 2026
CVE-2026-22853
FreeRDP is a free implementation of the Remote Desktop Protocol
9.8
CVSS
0.8%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.8% · higher than 56% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
FR
Freerdp · Freerdp
before 3.20.1 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-22853
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-22853
Release Notes
https://github.com/FreeRDP/FreeRDP/releases/tag/3.20.1
Exploit
https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-47v9-p4gp-w5ch
access.redhat.com
https://access.redhat.com/errata/RHSA-2026:19033
access.redhat.com
https://access.redhat.com/errata/RHSA-2026:3068
access.redhat.com
https://access.redhat.com/errata/RHSA-2026:4121
access.redhat.com
https://access.redhat.com/security/cve/CVE-2026-22853
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