Dashboard / CVE-2026-121963

CVE-2026-121963

HIGH
MEDIUM Priority: 0.03 BB Relevance: 66/100
Published: 2026-11-04 Modified: 2026-11-05 First seen: 2026-11-04 Status: active

Attack Surface

Network No Auth No Interaction

CVSS Vector Breakdown

AV: Network
AC: High
PR: None
UI: None
S: X
AT: Present
VC: None
VI: None
VA: High

Description

FreeRDP before 3.32.2 contains a use-after-free vulnerability in the asynchronous dynamic rdpsnd channel that allows malicious RDP servers to trigger freed callback access by closing the channel with queued audio PDUs. Attackers can send a training PDU then close the channel so the playback thread reads the freed callback in rdpsnd_virtual_channel_write, crashing the client.

Weakness Classification (2)

Affected Software (3)

VendorProductVersion
FreeRDP FreeRDP 0 < 3.32.2
FreeRDP FreeRDP 0 < 3.32.2
freerdp freerdp < 3.32.2

References & Advisories (2)

Bug Bounty Relevance

66 / 100
✓ Network accessible
✓ No authentication
✓ No user interaction

CVSS Score

8.2 / 10.0 v4.0
CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

EPSS — Exploitation Probability

0.31%
Raw Score 0.003130
Percentile 24.5%
Date 2026-11-14

EPSS Trend

2026-11-14
0.00313
2026-11-13
0.00313
2026-11-12
0.00313
2026-11-10
0.00313
2026-11-09
0.00313
2026-11-08
0.00313
2026-11-07
0.00313
2026-11-06
0.00313
2026-11-05
0.00308

Intelligence Sources

mitre ref →
nvd ref →

External Links