CVE-2026-121404
HIGH
MEDIUM
Priority: 0.03
BB Relevance:
64/100
Published: 2026-11-03
Modified: 2026-11-03
First seen: 2026-11-03
Status: active
Attack Surface
Network
Low Complexity
No Interaction
CVSS Vector Breakdown
AV:
Network
AC:
Low
PR:
Low
UI:
None
S:
X
AT:
None
VC:
None
VI:
None
VA:
High
Description
FreeRDP before 3.32.2 contains a denial of service vulnerability in the shadow server that allows authenticated RDP clients to spin server threads by sending zero-length drdynvc DATA PDUs. Attackers can send empty DATA messages on opened audin or rdpgfx channels, so that FreeRDP_WTSVirtualChannelRead never consumes them, consuming full CPU cores until disconnect.
Weakness Classification (1)
Affected Software (3)
References & Advisories (2)
vendor-advisory
third-party-advisory