CVE•Published 2026-01-19•Modified 2026-06-30•1 article on news•6 live references•NVD data
CVE-2026-23883Freerdp · Freerdp
Vulnerability data via NVD (ingested)
CVSS v3.1
9.8
CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS percentile
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Weaknesses (CWE)
Description
FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.21.0, `xf_Pointer_New` frees `cursorPixels` on failure, then `pointer_free` calls `xf_Pointer_Free` and frees it again, triggering ASan UAF. A malicious server can trigger a client‑side use after free, causing a crash (DoS) and potential heap corruption with code‑execution risk depending on allocator behavior and surrounding heap layout. Version 3.21.0 contains a patch for the issue.
Timeline
Published 2026-01-19
Modified 2026-06-30
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-2026-23883Hosts 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-2026-23883Country / ASN / product breakdown for the vuln query.
Censys
vulnerabilities.cve_id: CVE-2026-23883Censys host search filtered to this CVE id.
grep.app
CVE-2026-23883Public source-code mentions — fast PoC discovery.
GitHub code
CVE-2026-23883GitHub code search for direct mentions.
Google dork
"CVE-2026-23883" exploit -site:nvd.nist.govWrite-ups and news, NVD excluded.
Known PoCs on GitHub
No public proof-of-concept repositories found for CVE-2026-23883 on GitHub.