🔐 CVE Alert

CVE-2026-121406

MEDIUM 4.3

FreeRDP before 3.32.2 Client Denial of Service via Zero-Output ZGFX Payload

CVSS Score
4.3
EPSS Score
0.0%
EPSS Percentile
0th

FreeRDP before 3.32.2 allows a client assertion abort because rdpgfx_on_data_received rejects only negative zgfx_decompress status and passes the resulting null output pointer to Stream_StaticConstInit. A malicious RDP server can send a zero-output ZGFX payload on the RDPGFX channel after session activation to terminate the client.

CWE CWE-617
Vendor freerdp
Product freerdp
Published Nov 3, 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: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
0 < 3.32.2

References

NVD ↗ CVE.org ↗ EPSS Data ↗
github.com: https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-2c9x-4gr7-hrwx vulncheck.com: https://www.vulncheck.com/advisories/freerdp-before-3.32.2-client-denial-of-service-via-zero-output-zgfx-payload

Credits

Kushalkhemka mayank-jangid-moon opensec-intelligence