FreeRDP up to 3.32.1 Routing denial of service

Summaryinfo

A vulnerability classified as problematic has been found in FreeRDP. Affected by this vulnerability is an unknown functionality of the component Routing. The manipulation leads to denial of service. This vulnerability is documented as CVE-2026-121409. The attack can be initiated remotely. There is not any exploit available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability was found in FreeRDP and classified as problematic. This issue affects some unknown processing of the component Routing. The manipulation with an unknown input leads to a denial of service vulnerability. Using CWE to declare the problem leads to CWE-404. The product does not release or incorrectly releases a resource before it is made available for re-use. Impacted is availability. The summary by CVE is:

FreeRDP before 3.32.2 contains a denial of service vulnerability that allows malicious servers or unauthenticated peers to abort clients or proxies via oversized X.224 routing tokens. Attackers can send an oversized LoadBalanceInfo in a Server Redirection PDU, or a 240–247 byte token to a FixedTarget freerdp-proxy, triggering a tpdu_write_header assertion that crashes the process.

It is possible to read the advisory at github.com. The identification of this vulnerability is CVE-2026-121409 since 11/03/2026. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1499 according to MITRE ATT&CK.

Upgrading to version 3.32.2 eliminates this vulnerability.

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Type

• Remote Access Software

Name

• FreeRDP

Version

• 1.0.0
• 1.0.1
• 1.0.2
• 1.1.0-beta+2013071101
• 1.1.0-beta1
• 2.0.0
• 2.0.0-beta1
• 2.0.0-beta1+android11
• 2.0.0-rc4
• 2.1.0
• 2.1.1
• 2.1.2
• 2.2.0
• 2.3.0
• 2.4.0
• 2.4.1
• 2.7.0
• 2.8.1
• 2.9.0
• 2.11.0
• 2.11.5
• 2.11.6
• 2.11.8
• 3.0.0
• 3.0.0-beta2
• 3.0.0-beta3
• 3.1
• 3.2.0
• 3.4
• 3.5.0
• 3.5.1
• 3.9.0
• 3.20.0
• 3.20.1
• 3.21.0
• 3.22
• 3.22.0
• 3.23.0
• 3.24.0
• 3.24.2
• 3.25.0
• 3.26.0
• 3.27
• 3.27.0
• 3.27.1
• 3.28.0
• 3.29.0
• 3.30.0
• 3.31
• 3.31.0
• 3.32.0
• 3.32.1

License

• open-source

Website

• Product: https://github.com/FreeRDP/FreeRDP/

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CPE 2.2info

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