CVE-2026-22853

CRITICAL
2026-01-14 [email protected]
9.8
CVSS 3.1
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CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

Lifecycle Timeline

4
Patch Released
Apr 09, 2026 - 20:30 nvd
Patch available
Analysis Generated
Mar 12, 2026 - 21:54 vuln.today
PoC Detected
Jan 20, 2026 - 18:39 vuln.today
Public exploit code
CVE Published
Jan 14, 2026 - 18:16 nvd
CRITICAL 9.8

Tags

Buffer Overflow Freerdp Redhat Suse

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.

Analysis

FreeRDP RDPEAR NDR array reader has a heap overflow due to missing bounds checking on element counts. Malicious RDP server can overwrite heap memory. …

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Remediation

Within 24 hours: Identify all affected systems and apply vendor patches immediately. If patching is delayed, consider network segmentation to limit exposure.

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Priority Score

69
Low Medium High Critical
KEV: 0
EPSS: +0.1
CVSS: +49
POC: +20

Vendor Status

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CVE-2026-22853 vulnerability details – vuln.today
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