---
id: "CVE-2026-50751"
kind: "vulnerability"
aliases: ["CVE-2026-50751"]
title: "A logic flow weakness in Remote Access and Mobile Access certificate validation in deprecated IKEv1 key exchange\u2026"
severity: "critical"
cvss: 9.3
epss: null
exploited: true
status: "open"
category: "infrastructure"
products: [{"name": "Check Point Security Gateway", "fixed": [], "affected": "", "ecosystem": "vendor"}, {"name": "checkpoint gaia os", "fixed": ["r81.20"], "affected": ">= r80.40, < r81.20", "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"}, {"name": "checkpoint gaia embedded", "fixed": ["r81.10.17"], "affected": ">= r80.20.00, < r81.10.17", "ecosystem": "vendor"}, {"name": "checkpoint gaia embedded", "fixed": [], "affected": "= r81.10.17", "ecosystem": "vendor"}, {"name": "checkpoint gaia embedded", "fixed": ["r82.00.10"], "affected": ">= r80.20.00, < r82.00.10", "ecosystem": "vendor"}, {"name": "checkpoint gaia embedded", "fixed": [], "affected": "= r82.00.10", "ecosystem": "vendor"}]
ecosystems: ["vendor"]
tags: ["check-point", "exploited", "ikev1", "infrastructure", "ransomware", "remote-access-vpn", "vpn-gateway"]
not_affected_if: ["no-ikev1-remote-access-vpn"]
published_at: "2026-06-08T00:00:00+00:00"
first_seen_at: "2026-10-23T19:11:51+00:00"
updated_at: "2026-10-23T23:44:51+00:00"
sources: [{"source": "kev", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2026-50751", "first_seen_at": "2026-10-23T19:11:51+00:00"}, {"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-50751", "first_seen_at": "2026-10-23T23:44:51+00:00"}]
---

# A logic flow weakness in Remote Access and Mobile Access certificate validation in deprecated IKEv1 key exchange…

Check Point Security Gateway has an improper authentication flaw in its IKEv1 key exchange that lets an unauthenticated remote attacker skip user authentication. The attacker can establish a remote access VPN connection without a valid user password.

_Summary, check and fix written by a model from the sources; labelled as such._

## Affected

- vendor:Check Point Security Gateway affected ? fixed ?
- vendor:checkpoint gaia os affected >= r80.40, < r81.20 fixed r81.20
- vendor:checkpoint gaia os affected = r81.20 fixed ?
- vendor:checkpoint gaia os affected = r82 fixed ?
- vendor:checkpoint gaia os affected = r82.10 fixed ?
- vendor:checkpoint gaia embedded affected >= r80.20.00, < r81.10.17 fixed r81.10.17
- vendor:checkpoint gaia embedded affected = r81.10.17 fixed ?
- vendor:checkpoint gaia embedded affected >= r80.20.00, < r82.00.10 fixed r82.00.10
- vendor:checkpoint gaia embedded affected = r82.00.10 fixed ?

## Fix

Apply the mitigations in Check Point's vendor advisory, as CISA requires; the sources do not name a fixed version. If no mitigation is available, discontinue use of the product per CISA guidance.

## Timeline

- 2026-10-23T19:11:51+00:00 kev https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2026-50751
- 2026-10-23T23:44:51+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-50751

## From the sources

Check Point Security Gateway contains an improper authentication vulnerability in IKEv1 key exchange that could allow an unauthenticated remote attacker to bypass user authentication and establish a remote access VPN connection without a valid user password.

CISA required action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

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_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_