CVE•Published 2026-04-24•Modified 2026-04-27•0 articles on news•5 live references•NVD data

CVE-2026-40254Freerdp · Freerdp

Vulnerability data via NVD (ingested)

CVSS v3.1

4.2

MEDIUM

CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N

EPSS percentile

Exploit Prediction Scoring System · top 92% of all CVEs

Weaknesses (CWE)

CWE-193Off-by-one Error

Description

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.

Timeline

Published 2026-04-24

Modified 2026-04-27

External references

NVD MITRE Exploit-DB Sploitus VulnCheck

Search for exposed instances

Shodan + Censys queries derived from NVD's CPE data. The vuln tag catches assets Shodan has explicitly linked to this CVE; the product / banner fingerprints find exposed instances even when the vuln tag was never applied (which is common).

Shodan · vuln tag0 hosts

vuln:CVE-2026-40254

Hosts Shodan has explicitly fingerprinted as vulnerable.

Shodan · product

product:"Freerdp Freerdp"

All exposed Freerdp Freerdp instances — cross-reference with the CVE's affected-version range.

Shodan · banner/body mention

http.html:"Freerdp"

HTTP body or banner mentions "Freerdp" — catches deploys Shodan didn't identify as a product.

More intel sources (5)

Shodan report

vuln:CVE-2026-40254