CVE-2026-121396

MEDIUM 4.3

FreeRDP 3.0.0 before 3.32.2 denial of service via RTS padding assertion

CVSS Score

4.3

EPSS Score

0.0%

EPSS Percentile

0th

FreeRDP clients from 3.0.0 before 3.32.2 built with verbose WinPR assertions contain a reachable assertion in rts_read_auth_verifier triggered by malformed RTS padding. Attackers controlling an RD Gateway can send a crafted RPC-over-HTTP RTS PDU with inconsistent authentication padding to abort the connecting client process.

CWE	CWE-617
Vendor	freerdp
Product	freerdp
Published	Nov 3, 2026

Stay Ahead of the Next One

Get instant alerts for freerdp freerdp

Be the first to know when new medium vulnerabilities affecting freerdp freerdp are published — delivered to Slack, Telegram or Discord.

Get Free Alerts → Free · No credit card · 60 sec setup

CVSS v3 Breakdown

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

Low

Affected Versions

FreeRDP / FreeRDP

3.0.0 < 3.32.2

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-6p3w-fv52-cf24 vulncheck.com: https://www.vulncheck.com/advisories/freerdp-3.0.0-before-3.32.2-denial-of-service-via-rts-padding-assertion

Credits

Kushalkhemka mayank-jangid-moon skigeek16 opensec-intelligence