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Vulnerability Details :

CVE-2026-40254

Summary
Assigner-GitHub_M
Assigner Org ID-a0819718-46f1-4df5-94e2-005712e83aaa
Published At-24 Apr, 2026 | 02:24
Updated At-24 Apr, 2026 | 12:06
Rejected At-
Credits

FreeRDP: contains_dotdot() off-by-one allows drive channel path traversal via terminal ..

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.

Vendors
-
Not available
Products
-
Metrics (CVSS)
VersionBase scoreBase severityVector
Weaknesses
Attack Patterns
Solution/Workaround
References
HyperlinkResource Type
EPSS History
Score
Latest Score
-
N/A
No data available for selected date range
Percentile
Latest Percentile
-
N/A
No data available for selected date range
Stakeholder-Specific Vulnerability Categorization (SSVC)
▼Common Vulnerabilities and Exposures (CVE)
cve.org
Assigner:GitHub_M
Assigner Org ID:a0819718-46f1-4df5-94e2-005712e83aaa
Published At:24 Apr, 2026 | 02:24
Updated At:24 Apr, 2026 | 12:06
Rejected At:
▼CVE Numbering Authority (CNA)
FreeRDP: contains_dotdot() off-by-one allows drive channel path traversal via terminal ..

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.

Affected Products
Vendor
FreeRDPFreeRDP
Product
FreeRDP
Versions
Affected
  • < 3.25.0
Problem Types
TypeCWE IDDescription
CWECWE-193CWE-193: Off-by-one Error
Type: CWE
CWE ID: CWE-193
Description: CWE-193: Off-by-one Error
Metrics
VersionBase scoreBase severityVector
3.14.2MEDIUM
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N
Version: 3.1
Base score: 4.2
Base severity: MEDIUM
Vector:
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-3xpj-m4hx-8vmx
x_refsource_CONFIRM
Hyperlink: https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-3xpj-m4hx-8vmx
Resource:
x_refsource_CONFIRM
▼Authorized Data Publishers (ADP)
CISA ADP Vulnrichment
Affected Products
Metrics
VersionBase scoreBase severityVector
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-3xpj-m4hx-8vmx
exploit
Hyperlink: https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-3xpj-m4hx-8vmx
Resource:
exploit
Information is not available yet
▼National Vulnerability Database (NVD)
nvd.nist.gov
Source:security-advisories@github.com
Published At:24 Apr, 2026 | 03:16
Updated At:27 Apr, 2026 | 17:44

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.

CISA Catalog
Date AddedDue DateVulnerability NameRequired Action
N/A
Date Added: N/A
Due Date: N/A
Vulnerability Name: N/A
Required Action: N/A
Metrics
TypeVersionBase scoreBase severityVector
Secondary3.14.2MEDIUM
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N
Primary3.16.1MEDIUM
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Type: Secondary
Version: 3.1
Base score: 4.2
Base severity: MEDIUM
Vector:
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N
Type: Primary
Version: 3.1
Base score: 6.1
Base severity: MEDIUM
Vector:
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
CPE Matches
FreeRDP
freerdp
>>freerdp>>Versions before 3.25.0(exclusive)
cpe:2.3:a:freerdp:freerdp:*:*:*:*:*:*:*:*
Weaknesses
CWE IDTypeSource
CWE-193Secondarysecurity-advisories@github.com
CWE ID: CWE-193
Type: Secondary
Source: security-advisories@github.com
Evaluator Description
Evaluator Impact

Evaluator Solution

Vendor Statements
References
HyperlinkSourceResource
https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-3xpj-m4hx-8vmxsecurity-advisories@github.com
Exploit
Mitigation
Vendor Advisory
https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-3xpj-m4hx-8vmx134c704f-9b21-4f2e-91b3-4a467353bcc0
Exploit
Mitigation
Vendor Advisory
Hyperlink: https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-3xpj-m4hx-8vmx
Source: security-advisories@github.com
Resource:
Exploit
Mitigation
Vendor Advisory
Hyperlink: https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-3xpj-m4hx-8vmx
Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0
Resource:
Exploit
Mitigation
Vendor Advisory

Change History

0
Information is not available yet

Similar CVEs

1Records found
CVE-2026-67293
Matching Score-8
Assigner-VulnCheck
ShareView Details
Matching Score-8
Assigner-VulnCheck
CVSS Score-9.3||CRITICAL
EPSS-Not Assigned
Published-01 Aug, 2026 | 12:22
Updated-01 Aug, 2026 | 13:16
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available
FreeRDP before 3.29.0 Improper Certificate Hostname Validation

FreeRDP before 3.29.0 (affected versions <= 3.28.0) contains an improper certificate hostname validation vulnerability. The TLS hostname matcher (tls_match_hostname() in libfreerdp/crypto/tls.c) treats a wildcard pattern such as *.example.com as matching any hostname ending in .example.com, so it incorrectly accepts a wildcard certificate for multi-label subdomains like a.b.example.com (which OpenSSL's X509_check_host() rejects). This weakens TLS server authentication under wildcard-certificate conditions.

Action-Not Available
Vendor-FreeRDP
Product-FreeRDP
CWE ID-CWE-295
Improper Certificate Validation
Details not found