Heap Buffer Overflow in FreeRDP Remote Desktop Protocol Implementation
CVE-2026-22854

6.8MEDIUM

Key Information:

Vendor

Freerdp

Status
Freerdp
Vendor
CVE Published:
14 January 2026

What is CVE-2026-22854?

FreeRDP, an open-source implementation of the Remote Desktop Protocol, is vulnerable to a heap buffer overflow prior to version 3.20.1. This vulnerability allows an attacker to manipulate the server-controlled read length when processing drive reads, resulting in an oversized read that can overwrite critical heap memory. This exploitation scenario could potentially lead to arbitrary code execution or unstable behavior of the application. Users are strongly encouraged to upgrade to version 3.20.1 or later to mitigate this risk. Further details can be found in the official advisories.

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Affected Version(s)

FreeRDP < 3.20.1

References

https://github.com/FreeRDP/FreeRDP/security/advisories/GH...
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https://github.com/FreeRDP/FreeRDP/releases/tag/3.20.1
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CVSS V4

Score:
6.8
Severity:
MEDIUM
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
High
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
Unknown

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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