CVE detail
CVE-2026-40033
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.
Buzz score
Why this CVE is surfacing
This all-time snapshot uses the same composite formula as Trending across a 30-year evidence window, rather than a current rolling window.
Buzz score components · mention 22.0 · diversity 14.5 · KEV 0.0 · OTX 0.0 · PoC 0.0
Why it matters now
Mention timeline
- Total mentions
- 0
- within the 30d window
- Peak daily
- 0
- highest bucket
Evidence
Source links by recency
8 source links · newest first
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-40033.jsonsecurity.access.redhat.com
No excerpt available.
Vendor Advisorysecurity.access.redhat.comMay 26, 2026, 3:16 PM - https://bugzilla.redhat.com/show_bug.cgi?id=2481473bugzilla.redhat.com
No excerpt available.
Exploitbugzilla.redhat.comMay 26, 2026, 3:16 PM - https://access.redhat.com/security/cve/CVE-2026-40033access.redhat.com
No excerpt available.
Vendor Advisoryaccess.redhat.comMay 26, 2026, 3:16 PM - https://access.redhat.com/errata/RHSA-2026:36203access.redhat.com
No excerpt available.
Vendor Advisoryaccess.redhat.comMay 26, 2026, 3:16 PM - https://www.vulncheck.com/advisories/freerdp-heap-buffer-overflow-in-gdi-cachetosurface-via-rectangle-validation-bypasswww.vulncheck.com
No excerpt available.
Exploitwww.vulncheck.comMay 26, 2026, 3:16 PM No excerpt available.
Exploitgithub.comMay 26, 2026, 3:16 PMNo excerpt available.
Exploitgithub.comMay 26, 2026, 3:16 PMNo excerpt available.
Exploitgithub.comMay 26, 2026, 3:16 PM
Exploit code
Public exploit repository references
Public PoC repositories are third-party, potentially unsafe artifacts. Treat their code as untrusted and use it only on authorized systems in an isolated, least-privilege environment. cvebuzz does not execute the code or verify that an exploit works.
0 repository references · best confidence N/A · max 0 stars
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