{"id":"CVE-2026-85102","kind":"vulnerability","aliases":["CVE-2026-85102"],"related":[],"title":"Improper certificate trust validation during VPN negotiation in Check Point Quantum Security Gateway may allow an…","description":"Check Point Security Gateway and Check Point Spark Firewall using Site to Site VPN or Remote Access VPN contain an improper certificate validation vulnerability which could allow an unauthenticated remote attacker to execute arbitrary code on the Gateway.\n\nCISA required action: Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.","summary":"Check Point Security Gateway and Spark Firewall appliances accept certificates improperly during Site-to-Site and Remote Access VPN handshakes, so an unauthenticated remote attacker can execute arbitrary code on the gateway. CISA lists it as actively exploited in the wild.","severity":"critical","cvss":9.8,"epss":null,"exploited":true,"exploited_at":"2026-09-22T00:00:00+00:00","products":[{"name":"Check Point Multiple Products","fixed":[],"affected":"","ecosystem":"vendor"},{"name":"checkpoint gaia embedded","fixed":["r81.10.17"],"affected":">= r81.10.00, < r81.10.17","ecosystem":"vendor"},{"name":"checkpoint gaia embedded","fixed":["r82.00.10"],"affected":">= r82.00.00, < r82.00.10","ecosystem":"vendor"},{"name":"checkpoint gaia embedded","fixed":[],"affected":"= r81.10.17","ecosystem":"vendor"},{"name":"checkpoint gaia embedded","fixed":[],"affected":"= r82.00.10","ecosystem":"vendor"},{"name":"checkpoint gaia os","fixed":["r81.10"],"affected":">= r80, < r81.10","ecosystem":"vendor"},{"name":"checkpoint gaia os","fixed":[],"affected":"= r81.10","ecosystem":"vendor"},{"name":"checkpoint gaia os","fixed":[],"affected":"= r81.20","ecosystem":"vendor"},{"name":"checkpoint gaia os","fixed":[],"affected":"= r82","ecosystem":"vendor"},{"name":"checkpoint gaia os","fixed":[],"affected":"= r82.10","ecosystem":"vendor"}],"ecosystems":["vendor"],"tags":["check-point","exploited","security-gateway","self-hosted","spark-firewall","vendor","vpn"],"not_affected_if":["managed-hosting","no-remote-access-vpn","no-site-to-site-vpn"],"how_to_check":"Check whether the gateway runs Site-to-Site or Remote Access VPN and confirm the exact affected version in the Check Point advisory: unknown\nReview Check Point's vendor advisory for the fixed build: unknown\nReview gateway logs for unexpected VPN connections and forensics artifacts per CISA guidance: unknown","fix":"Apply the vendor mitigation or hotfix from Check Point as directed by CISA; the specific version is unknown in the sources.\nIf no mitigation exists, take the affected VPN service offline or discontinue use until patched, per BOD 26-04.","status":"open","published_at":"2026-09-09T13:20:43+00:00","first_seen_at":"2026-10-23T19:11:50+00:00","triaged_at":"2026-10-23T20:29:46+00:00","updated_at":"2026-10-23T23:44:52+00:00","category":"vendor","confidence":0.6,"triage":{"at":"2026-10-23T20:29:46Z","model":"claude-haiku-5-5","output":{"fix":"Apply the vendor mitigation or hotfix from Check Point as directed by CISA; the specific version is unknown in the sources.\nIf no mitigation exists, take the affected VPN service offline or discontinue use until patched, per BOD 26-04.","summary":"Check Point Security Gateway and Spark Firewall appliances accept certificates improperly during Site-to-Site and Remote Access VPN handshakes, so an unauthenticated remote attacker can execute arbitrary code on the gateway. CISA lists it as actively exploited in the wild.","category":"vendor","who_cares":["check-point","security-gateway","spark-firewall","vpn","self-hosted"],"confidence":0.6,"analyst_note":"Find the affected and fixed Check Point versions and the vendor advisory from the CISA KEV entry at https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2026-85102.","how_to_check":"Check whether the gateway runs Site-to-Site or Remote Access VPN and confirm the exact affected version in the Check Point advisory: unknown\nReview Check Point's vendor advisory for the fixed build: unknown\nReview gateway logs for unexpected VPN connections and forensics artifacts per CISA guidance: unknown","needs_analyst":true,"not_affected_if":["no-site-to-site-vpn","no-remote-access-vpn","managed-hosting"],"severity_if_unknown":"critical"},"cost_usd":0.000482,"input_tokens":2234,"output_tokens":517,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-04':165C,191C,222C '-2026':17A,20A '-85102':18A,21A '26':164C,190C,221C 'accept':76B 'access':86B,126C 'accord':154C 'action':150C 'activ':105B 'adher':218C 'allow':15A,136C 'appli':151C 'applianc':75B 'applic':188C 'arbitrari':96B,143C 'asset':212C 'attack':93B,140C 'base':169C 'bod':163C,189C,220C 'certif':2A,77B,131C 'check':9A,22A,54B,68B,110C,115C 'check-point':53B 'checkpoint':26A,29A,32A,35A,38A,41A,44A,47A,50A 'cisa':101B,148C,161C,178C 'cloud':194C 'code':97B,144C 'complianc':159C 'contain':128C 'could':135C 'cve':16A,19A 'discontinu':197C 'embedded':28A,31A,34A,37A 'ensur':158C,217C 'evalu':210C 'execut':95B,142C 'exploit':56B,106B 'exposur':215C 'firewal':65B,74B,118C 'follow':187C 'forens':180C 'gaia':27A,30A,33A,36A,39A,42A,45A,48A,51A 'gateway':13A,59B,71B,100B,113C,147C 'guidanc':176C,192C 'guidelin':224C 'handshak':88B 'host':62B 'improp':1A,78B,130C 'instruct':157C 'internet':214C 'list':102B 'may':14A 'mitig':152C,203C 'multiple':24A 'negoti':7A 'note':175C,186C 'os':40A,43A,46A,49A,52A 'patch':223C 'point':10A,23A,55B,69B,111C,116C 'priorit':166C 'product':201C 'products':25A 'quantum':11A 'remot':85B,92B,125C,139C 'requir':149C,182C 'respons':208C 'risk':171C 'secur':12A,58B,70B,112C,167C 'security-gateway':57B 'see':172C,183C 'self':61B 'self-host':60B 'servic':195C 'site':81B,83B,120C,122C 'site-to-sit':80B 'spark':64B,73B,117C 'spark-firewal':63B 'stakehold':206C 'triag':181C 'trust':3A 'unauthent':91B,138C 'unavail':205C 'updat':168C 'url':173C,184C 'use':119C,198C 'valid':4A,132C 'vendor':66B,156C 'vpn':6A,67B,87B,123C,127C 'vulner':133C 'wild':109B","nicknames":[],"mitigations":[],"who_affected":null,"tier":null,"verified":{},"analyst_revisit_at":null,"first_public_at":"2026-09-09T13:20:43+00:00","kev":{"dateAdded":"2026-09-22","dueDate":"2026-09-25","requiredAction":"Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.","knownRansomwareCampaignUse":"Unknown"},"cvss_vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","cvss_by":"cve@checkpoint.com","poc_count":0,"sources":[{"source":"kev","external_id":"CVE-2026-85102","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2026-85102","severity":null,"published_at":"2026-09-22T00:00:00+00:00","modified_at":null,"first_seen_at":"2026-10-23T19:11:50+00:00","fetched_at":"2026-10-25T12:39:21+00:00","note":null},{"source":"nvd","external_id":"CVE-2026-85102","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-85102","severity":null,"published_at":"2026-09-09T13:20:43+00:00","modified_at":"2026-09-23T18:22:07+00:00","first_seen_at":"2026-10-23T23:44:52+00:00","fetched_at":"2026-10-23T23:44:52+00:00","note":null}],"documents":[],"notice":"Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai"}