CVE•Published 2026-05-26•Modified 2026-05-27•1 article on news•5 live references•NVD data
CVE-2026-40033Freerdp · Freerdp
Vulnerability data via NVD (ingested)
CVSS v3.1
8.8
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
EPSS percentile
—
Weaknesses (CWE)
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.
Timeline
Published 2026-05-26
Modified 2026-05-27
External references
Search for exposed instances
Shodan + Censys queries derived from NVD's CPE data. The vuln tag catches assets Shodan has explicitly linked to this CVE; the product / banner fingerprints find exposed instances even when the vuln tag was never applied (which is common).
Shodan · vuln tag0 hosts
vuln:CVE-2026-40033Hosts Shodan has explicitly fingerprinted as vulnerable.
Shodan · product
product:"Freerdp Freerdp"All exposed Freerdp Freerdp instances — cross-reference with the CVE's affected-version range.
Shodan · banner/body mention
http.html:"Freerdp"HTTP body or banner mentions "Freerdp" — catches deploys Shodan didn't identify as a product.
More intel sources (5)
Shodan report
vuln:CVE-2026-40033Country / ASN / product breakdown for the vuln query.
Censys
vulnerabilities.cve_id: CVE-2026-40033Censys host search filtered to this CVE id.
grep.app
CVE-2026-40033Public source-code mentions — fast PoC discovery.
GitHub code
CVE-2026-40033GitHub code search for direct mentions.
Google dork
"CVE-2026-40033" exploit -site:nvd.nist.govWrite-ups and news, NVD excluded.