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VULNERABILITIES

CVE-2026-91963 Details

Description

FreeRDP versions before 3.31.0 contain an uninitialized heap memory disclosure vulnerability in the urbdrc USB redirection channel. A malicious RDP server can induce failing USB transfers to read uninitialized heap memory from the client, defeating ASLR and enabling remote code execution when chained with memory corruption vulnerabilities.

Metrics

CVSS 3.x Severity and Vector Strings:

CNA: [email protected]CVSS-B:6.5 MEDIUMVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N

References to Advisories, Solutions, and Tools

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URLSource(s)Tag(s)
https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-hw7p-5h2r-83gq CISA-ADPVendor Advisory
https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-hw7p-5h2r-83gq [email protected]Vendor Advisory
https://www.vulncheck.com/advisories/freerdp-2.0.0-through-3.30.0-uninitialized-heap-memory-disclosure-via-urbdrc [email protected]Third Party Advisory

Weakness Enumeration

CWE-IDCWE NameSource
CWE-457Use of Uninitialized Variable[email protected]

Affected Products

ProductVersions
freerdp freerdp
>= 2.0.0, < 3.31.0

CPE

  • cpe:2.3:a:freerdp:freerdp:*:*:*:*:*:*:*:*

Remediation

  • No remediation found in references.

Change History

3 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2026-91963
NVD Published Date:
Sep 15, 2026
NVD Last Modified:
Sep 23, 2026
Source:
[email protected]
CVE-2026-91963 Details - Not Deferred