Dashboard / CVE-2026-40033

CVE-2026-40033

HIGH
MEDIUM Priority: 0.12 BB Relevance: 67/100
Published: 2026-05-26 Modified: 2026-11-08 First seen: 2026-11-08 Status: active

Attack Surface

Network Low Complexity No Auth Conf. Impact Integ. Impact

CVSS Vector Breakdown

AV: Network
AC: Low
PR: None
UI: Passive
AT: None
VC: High
VI: High
VA: High

Description

FreeRDP before 3.26.0 contains a heap-buffer-overflow vulnerability in gdi_CacheToSurface that allows remote attackers to write out-of-bounds heap memory. The vulnerability occurs because rectangle validation clamps coordinates to UINT16_MAX but performs copy operations using unclamped cache entry dimensions, enabling malicious RDP servers to trigger large out-of-bounds writes and potentially achieve remote code execution or client crash.

Weakness Classification (1)

Affected Software (1)

VendorProductVersion
FreeRDP FreeRDP 0 < 3.26.0

References & Advisories (4)

Bug Bounty Relevance

67 / 100
✓ Network accessible
✓ No authentication
✓ Low complexity

CVSS Score

8.6 / 10.0 v4.0
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

EPSS — Exploitation Probability

1.36%
Raw Score 0.013650
Percentile 72.2%
Date 2026-11-13

EPSS Trend

2026-11-13
0.01365
2026-11-12
0.01365
2026-11-10
0.01365
2026-11-09
0.01365
2026-11-08
0.01365

Intelligence Sources

mitre ref →

External Links