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Linux Distros Unpatched Vulnerability : CVE-2026-40254

medium Nessus Plugin ID 310292

Synopsis

The Linux/Unix host has one or more packages installed with a vulnerability that the vendor indicates will not be patched.

Description

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

 - FreeRDP is a free implementation of the Remote Desktop Protocol. Versions prior to 3.25.0 have an off-by- one in the path traversal filter in `channels/drive/client/drive_file.c`. The `contains_dotdot()` function catches `../` and `..\` mid-path but misses `..` when it's the last component with no trailing separator.
 A rogue RDP server can read, list, or write files one directory above the client's shared folder through RDPDR requests. This requires the victim to connect with drive redirection enabled. Version 3.25.0 patches the issue. (CVE-2026-40254)

Note that Nessus relies on the presence of the package as reported by the vendor.

Solution

There is no known solution at this time.

See Also

https://access.redhat.com/security/cve/cve-2026-40254

Plugin Details

Severity: Medium

ID: 310292

File Name: unpatched_CVE_2026_40254.nasl

Version: 1.1

Type: Local

Agent: unix

Family: Misc.

Published: 4/25/2026

Updated: 4/25/2026

Supported Sensors: Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 5.0

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 4.3

Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:N/A:N

CVSS Score Source: CVE-2026-40254

CVSS v3

Risk Factor: Medium

Base Score: 4.2

Temporal Score: 3.9

Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N

Temporal Vector: CVSS:3.0/E:U/RL:U/RC:C

Vulnerability Information

CPE: p-cpe:/a:redhat:enterprise_linux:freerdp, p-cpe:/a:centos:centos:freerdp-plugins, cpe:/o:centos:centos:8, cpe:/o:centos:centos:7, p-cpe:/a:redhat:enterprise_linux:libwinpr-devel, p-cpe:/a:centos:centos:freerdp-server, p-cpe:/a:centos:centos:libwinpr-devel, cpe:/o:redhat:enterprise_linux:8, cpe:/o:redhat:enterprise_linux:10, p-cpe:/a:redhat:enterprise_linux:freerdp-plugins, cpe:/o:redhat:enterprise_linux:7, cpe:/o:redhat:enterprise_linux:9, p-cpe:/a:centos:centos:freerdp, p-cpe:/a:redhat:enterprise_linux:freerdp-server, p-cpe:/a:redhat:enterprise_linux:freerdp-libs, p-cpe:/a:centos:centos:freerdp-libs, p-cpe:/a:centos:centos:libwinpr, p-cpe:/a:centos:centos:freerdp-devel, p-cpe:/a:redhat:enterprise_linux:freerdp-devel, cpe:/o:redhat:enterprise_linux:6, p-cpe:/a:redhat:enterprise_linux:libwinpr

Required KB Items: Host/local_checks_enabled, Host/cpu, global_settings/vendor_unpatched, Host/OS/identifier

Exploit Ease: No known exploits are available

Vulnerability Publication Date: 4/24/2026

Reference Information

CVE: CVE-2026-40254