CVE-2026-91961

MEDIUM 6.5

FreeRDP before 3.31.0 Denial of Service via URBDRC

CVSS Score

6.5

EPSS Score

0.0%

EPSS Percentile

0th

FreeRDP before 3.31.0 contains a denial-of-service vulnerability in the URBDRC control-transfer request path that fails to validate OutputBufferSize before forwarding to the libusb backend. A malicious RDP server can send a control-transfer request with OutputBufferSize set to 65536, triggering a reachable assertion that terminates the client process.

CWE	CWE-617
Vendor	freerdp
Product	freerdp
Published	Sep 15, 2026

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CVSS v3 Breakdown

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Affected Versions

FreeRDP / FreeRDP

0 < 3.31.0

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-w9qg-g24r-77f6 vulncheck.com: https://www.vulncheck.com/advisories/freerdp-before-3.31.0-denial-of-service-via-urbdrc

Credits

🔍 gulamovzavohir02-glitch